Minor docs edits and info on using Android Studio.
Adding some missing docs.
Adding docs for the Emulator Hello World sample code.
More emulator docs
Docs for the screen-sharing sample code.
Removing redundant information and adding a link to the reference docs.
Minor corrections.
Info on setPublisherVideoType() and the Genymotion Android emulator.
Merge pull request #43 from jeffswartz/jira/19215

Jira/19215