Address Android SDK documentation feedback from Anu.
Update iOS Docs
Move to single a tag per item
Merge pull request #22 from contexthub/ios-doc-update

Update iOS Docs
Update developer portal docs
Update index.md

Missed a zero *(as of today)*
Merge pull request #23 from contexthub/dev-portal-update

Update developer portal docs
Merge branch 'master' into android-sample-docs