Cleanup some docs (includes/*.php)

- Swap "$variable type" to "type $variable"
- Added missing types
- Fixed spacing inside docs
- Makes beginning of @param/@return/@var/@throws in capital
- Changed some types to match the more common spelling

Change-Id: I783e4dbfe5f6f98b32b9a03ccf6439e13e132bcc
Merge "Cleanup some docs (includes/*.php)"