Added some comments
Merge pull request #165 from FireBall1725/rv2

Added some comments
Removed methods only forwarding their call to the corresponding super class
Merge pull request #166 from iloveportalz0r/rv2

Deleted redundant null checks in various scenarios where it either would have crashed before by calling it already or because it was already checked before without modifying the current state of that variable.
Merge pull request #167 from yueh/cleanup-forwarding-super

Removed methods only forwarding their call to the corresponding super class