Reorganize docs and add contributing guides

This change introduces a reorganization of the information in the
README.md document, which has been split into several files in the
//docs folder, and adds the following information:

- //docs/contributing.md: New document containing information
  about how to contribute to the project.
- //docs/developers/build.md: Add information about CHROMIUM_MV3
- //docs/developers/set_up.md: New document containing information on
  how to set up the development environment.
- //docs/developers/add_feature.md: Blank document which will contain
  info on how to add a new feature/option to the extension.

Fixes: #26
Change-Id: I44c69ccbc20e609c5416e08fe0ef3b7934080d17
diff --git a/README.md b/README.md
index 1ab9140..6373612 100644
--- a/README.md
+++ b/README.md
@@ -4,94 +4,30 @@
 An extension which brings several enhancements to the Google Forums and the
 Community Console.
 
-## Release cycle
-When the code in the `master` branch is considered to be stable, a release can
-be made. This is the procedure:
+For a list of features/enhancements, check out the
+[feature list doc](docs/features.md).
 
-1. Tag the last commit with a version number (in the format `vx`, where x is the
-extension's [version number](https://developer.chrome.com/extensions/manifest/version)
-for that release) by running `bash tagRelease.bash --version vx`. Note that the
-tag must be pushed to Gerrit after being created.
-2. Build the extension for both the stable and beta channels (this is explained
-in the next section). This will output a ZIP file for each release channel and
-each supported browser.
+## Information for contributors
+This extension is being actively developed, and everyone is welcome to make
+feature requests, report issues and contribute code changes.
 
-Afterwards, the release/build files must be submitted to the Chrome Web Store
-and addons.mozilla.org.
+In order to make feature requests or report issues, please do so at the GitHub
+issue tracker:
 
-### Submitting to the Chrome Web Store
-1. [Upload both release files](https://developer.chrome.com/webstore/publish#upload-your-item)
-to the Chrome Web Store, one for each release channel.
-2. [Submit both releases](https://developer.chrome.com/webstore/publish#submit-your-item-for-publishing)
-to be reviewed by the Chrome Web Store team, but in the case of the stable
-channel uncheck the "Publish automatically after it has passed review" option.
-3. Upload the beta release file to the
-[GitHub releases page](https://github.com/avm99963/infinitegforums/releases)
-under the newly created tag. Mark that release as a pre-release at GitHub.
-4. Wait until the beta release is reviewed and approved by Google.
-5. Test again the extension by using the beta channel. Check if the options have
-been transfered correctly from version to version, and wait some days (for
-instance between 3 and 5 days) to see if other people report issues with the
-updated version.
-6. If everything goes well, publish the update in the stable channel. The
-updated version should have already been reviewed by the Chrome Web Store team
-at this time.
-7. Update the release file in the GitHub releases page by removing the beta
-release file and uploading the stable release file. Also, remove the pre-release
-label.
+- [Issues · avm99963/infinitegforums · GitHub](https://github.com/avm99963/infinitegforums/issues)
 
-If during this process the release wasn't approved by Google or an issue was
-found during beta testing, a new release which fixes this should be created.
+To see a more exhaustive guide on how to contribute, and information on how to
+contribute code changes, please read the following doc: <!--It also includes
+links to resources which explain learn how the extension is built, how you can
+extend it, and how it can be built:-->
 
-### Submitting to addons.mozilla.org
-The procedure is similar to the one with the Chrome Web Store.
-
-@TODO: Add more details once the first version of the extension has been
-uploaded to addons.mozilla.org.
-
-## Build the extension
-A zip file with the contents of the extension, which can be uploaded to the
-Chrome Web Store and addons.mozilla.org, can be created with any of the
-following procedures (make sure to [install Go](https://golang.org) before
-building the extension, as it is needed during the build):
-
-### Using the release.bash script
-Run `bash release.bash -h` in order to learn how to use this command. To
-summarize, the command accepts the `--channel` and `--browser` flags (or their
-short versions `-c` and `-b`).
-
-As an example, if you wanted to create a ZIP file of the beta-branded extension
-targeted for Firefox, you would run `bash release.bash -c beta -b gecko`.
-
-### Using make
-You can also use _make_ to build the extension. This is just a wrapper for the
-`release.bash` command.
-
-Run `make all` to build the extension for all the available channels and
-browsers. You can also run `make {target}` where `{target}` is one of the
-following: `chromium-stable`, `chromium-beta`, `chromium-mv3-beta`,
-`gecko-stable`.
-
-Run `make clean` to clean all the release files (this removes the `out` folder,
-which is where the release files are saved).
-
-## Testing notes
-When testing the extension during development, you don't have to build the
-extension each time you want to import an updated version to Chrome/Firefox.
-Instead, run `go run generateManifest.go {browser}` once, where `{browser}` is
-`CHROMIUM`, `GECKO` or `CHROMIUM_MV3`, and this will generate a `manifest.json`
-file for the specified browser in the `src` directory. Now, you can load the
-`src` folder directly in the browser in order to import the extension, which
-removes the need to build it. When the `manifest.gjson` file is modified,
-you'll have to generate the manifest again.
-
-To test translations, you might want to set your browser's locale. This section
-tells you how to set the locale in
-[Windows](https://developer.chrome.com/extensions/i18n#testing-win),
-[Mac OS X](https://developer.chrome.com/extensions/i18n#testing-mac),
-[Linux](https://developer.chrome.com/extensions/i18n#testing-linux),
-and [Chrome OS](https://developer.chrome.com/extensions/i18n#testing-chromeos).
+- [Contributing to TW Power Tools](docs/contributing.md)
 
 ## Beta channel
+Before releasing updates to the stable channel, the newest versions are uploaded
+to the beta channel so they can be tested by everyone who's interested. This is
+another way to contribute to the project, because beta testing can make us
+notice bugs before they reach the stable channel.
+
 The beta channel for Chrome is available
 [here](https://chrome.google.com/webstore/detail/infinite-scroll-in-tw-bet/memmklnkkhifmflmidnflfcdepamljef).