Merge pull request #15 from Aupajo/master

	 Tweak setup formatting, add note about installing a system image for AVD
Removed extra backtick
Update setup.md
Fixed code block indentation.

Introduced in https://github.com/ouya/docs/commit/c93630ae9cdaca535d61ebc843cbeb4de360e045
Add trigger deprecation notes and tips
Merge branch 'master' of github.com:ouya/docs
Revert "Add trigger deprecation notes and tips"

This reverts commit 7977341fd22627f0c6098fc76948429271ba3f7d.
Add note about x86 HAXM