Switch to https for most links
Update obsolete links (groups, android doc on code.google.com)
Update instructions related to groups
Change-Id: I29a50cb5f026f0e1e00f2d2aadcfa2a138a96a03
diff --git a/src/source/index.md b/src/source/index.md
index 2ea2562..5fdcd58 100644
--- a/src/source/index.md
+++ b/src/source/index.md
@@ -35,7 +35,7 @@
to users on an open platform. One of the best ways you can help Android is to
write cool apps that users love!
-To get started, visit [developer.android.com](http://developer.android.com). This site
+To get started, visit [developer.android.com](https://developer.android.com). This site
provides the information and tools you need to write applications for
compatible Android devices, using the SDK.