reorganizing docs so language is first
splitting into versions with api changes
Update android-advanced-settings.md
Update android-advanced-settings.md
Update android-advanced-settings.md
Delete android-migration-guide.md
Delete android-migration-guide.md
Delete android-migration-guide.md
Update README.md
Update android-dev-guide.md
Update android-dev-guide.md
Update android-dev-guide.md
removing extra copies
Update README.md
Merge pull request #15 from Vungle/reorganize-documentation

Reorganize documentation