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
#196 - Add 'Tap here to begin' for quick photo
Fixes #194 - Dismiss any actionsheet on post media

- Uses currentActionSheet, not just addMediaActionSheet.
Removing UIImagePickerControllerReferenceURL checks.

Don't need to check for this anymore as it's been in the SDK since 4.1
Removing unnecessary UIImagePickerControllerMediaMetadata checks.

UIImagePickerControllerMediaMetadata has been in the SDK since 4.1.
Adding anchor for set featured image size popover. Fixes #224
Adding cancel button to resize menu for featured images on iPhones.

Fixes #236
Updating some CommentViewController declarations for consistency.
Fixed bug where tags on post settings didn't appear in post editor.

Fixes #172.
Fixed remaining static analyzer warnings
Merge branch 'develop' into fix-nux-hangs

Conflicts:
	WordPress/Classes/NewAddUsersBlogViewController.m
	WordPress/Classes/NewerAddUsersBlogViewController.m