Add misc/captura-pantalla-foros-google.md

This change also adds a custom screenshotpage.html template for that
specific page, in order to show the instruction for the appropriate OS
automatically.

Change-Id: Ifd7d2b1bda2e91f7e0a940705e23cbd7ee13612a
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..f6cb8ad
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1 @@
+BasedOnStyle: Google