Sample app documentation edits.
Merge pull request #30 from jeffswartz/v2.3-docs-edits

Sample app documentation edits
Adding audio levels
Scroll Bug Fixed - Charley's code.
Merge pull request #39 from madhavc/develop

Scroll Bug Fixed - Charley's code.
Added congestion UI to overlay-graphics
Merge pull request #40 from bsrao/update-to-2.3.0

2.3.0 updates
Fixed incorrect delegate
Merge pull request #41 from bsrao/minor-changes

Fixed incorrect delegate
Added Opentok framework shortcut to AudioLevel sample
Merge pull request #42 from bsrao/minor-changes

Added Opentok framework shortcut to AudioLevels sample
iOS 8 and Xcode 6 fixes
quicksvg patch file rename
Merge pull request #43 from bsrao/minor-changes

iOS 8 and Xcode 6 fixes