Refactor extension to webpack

This change is the biggest in the history of the project. The entire
project has been refactored so it is built with webpack.

This involves:
- Creating webpack and npm config files.
- Fixing some bugs in the code due to the fact that webpack uses strict
mode.
- Merging some pieces of code which were shared throughout the codebase
(not exhaustive, more work should be done in this direction).
- Splitting the console_inject.js file into separate files (it had 1000+
lines).
- Adapting all the build-related files (Makefile, bash scripts, etc.)
- Changing the docs to explain the new build process.
- Changing the Zuul playbook/roles to adapt to the new build process.

Change-Id: I16476d47825461c3a318b3f1a1eddb06b2df2e89
diff --git a/src/contentScripts/profileIndicator.js b/src/contentScripts/profileIndicator.js
new file mode 100644
index 0000000..5edc932
--- /dev/null
+++ b/src/contentScripts/profileIndicator.js
@@ -0,0 +1,13 @@
+import {injectScript, injectStylesheet} from '../common/contentScriptsUtils.js';
+import {setUpListener} from '../common/csEventListener.js';
+
+setUpListener();
+
+chrome.storage.sync.get(null, function(options) {
+  if (options.profileindicator || options.profileindicatoralt) {
+    injectScript(
+        chrome.runtime.getURL('profileIndicatorInject.bundle.js'));
+    injectStylesheet(
+        chrome.runtime.getURL('css/profileindicator_inject.css'));
+  }
+});