Update docs for intent & image size changes.
Update docs:

-add test mode info
-fix capitalization of variable name
[NEON-711] Add proguard information to docs
Fixed markdown
Merge branch 'unreleased' of github.com:neontv/docs [reviewed by Buddy]

Conflicts:
	purchasing.md
Merge branch 'master' of github.com:ouya/docs

Conflicts:
	purchasing.md
	setup.md
Update purchasing.md
Merge branch 'master' of github.com:ouya/docs

Conflicts:
	setup.md