Rename iOSCorrectedTextView to uppercase 'i'

Ref: https://github.com/wordpress-mobile/WordPress-iOS/commit/b7c4ca19eb23bac84bea00601fb301c18ef3610f#diff-5bbec26060fc3c86d4c6ba8f3c44392aR2
Fixes #222 Set exclusive touch on editor toolbar
Fixing build warning from SidebarTopLevelView.xib.
Fixes #181 Use navcontroller toolbar for comments

Uses the navigationController toolbar with the items defined in the xib.
Fixes #227 - Set a default value for the BOOL used in a conditional
Removed unused instance variable in app delegate
Fixes #167 - Add back button for post media item
Fixes #170 Tint colour to white for media item bar

@aerych mentions that "We should use the same bottom toolbar background style used in other places in the app." but the black gradient bar is seen in many places.
Static analysis fixes

- Garbage CGFloat
- BOOL pointer used improperly
Static analysis fixes - BOOL pointers
Merge branch 'develop' into feature/ios7-themes

Conflicts:
	WordPress/WordPress.xcodeproj/project.pbxproj