Use constant for undefined progress value
Add iOS 6.1 support.
Fix bug causing success and error images from not loading on iOS 7.

Silly me. I should have used instancesRespondToSelector: instead of
respondsToSelector: since the code is checking the class.
Fix positioning in iOS 8
- Transforms are no longer applied to windows for rotation, so ignore orientation specific logic
- Use window instead of screen for bounds
Add newline to end of file.

Xcode has a warning for this, so it's nice that this project can compile with that warning turned on.
Reference the sharedView via self not class name.

This would be consistent with the rest of the file, and would permit a subclass to override the implementation of sharedView.
Merge pull request #272 from kirbyt/master

Added iOS 6.1 support.
Merge pull request #284 from dkasper/master

Fix positioning in iOS 8
Use new enum declaration.

The new(er) NS_ENUM declaration makes dealing with enumerated values in Swift really nice.
Fix for deprecated sizeWithFont: method in iOS 8 SDK
Properly handle orientation changes across iOS 7 and 8.
Gave animationDuration an initial value of 0 to avoid warning in newer Xcode versions.
Merge pull request #336 from krzysztofzablocki/master

Properly handle orientation changes across iOS 7 and 8.
Merge pull request #335 from edwardmp/master

Fix for deprecated sizeWithFont: method in iOS 8 SDK
Merge pull request #332 from calebd/master

Use new enum declaration.
Fix: progress HUD appearing on external display

If an external display is connected and contains UIWindow, SVProgressHUD would previously pick it instead of the window on the main screen.
-allowing the label's text colour and font to be changed, otherwise it will retain the color/font values used the very first time only when it was initiated
remove annoying warning
fix crash on < iOS 7
Merge pull request #367 from kernandreas/master

fix crash on < iOS 7 and remove that annoying warning