Locally inhibit deprecation warning

This warning is not necessary since this code is only a fallback for older versions which don't support the otherwise invoked code, yet.
Clean up code, unified use of CGFloat, removed some whitespace
Replaced *.size.height and *.size.width with corresponding CGRect convenience methods
Clean up code, unified use of if / else
Merge branch 'master' of https://github.com/TransitApp/SVProgressHUD

Conflicts:
	SVProgressHUD/SVProgressHUD.h
	SVProgressHUD/SVProgressHUD.m
Merge branch 'inhibit-warning' of https://github.com/lumaxis/SVProgressHUD into lumaxis-inhibit-warning

Conflicts:
	SVProgressHUD/SVProgressHUD.m
Merge branch 'lumaxis-inhibit-warning'
Fixes #314, ensure overlay is always on top of rootViewController
Merge branch 'master' of https://github.com/TransitApp/SVProgressHUD