Added options for using light content for status bar,
default to indeterminate progress until a progress is > 0
Merge pull request #1 from antokne/develop

Added options for using light content for status bar,
Merge commit '8c8d9c8649e09014fff65f3b95babfa90837759c'

Conflicts:
	MWPhotoBrowser/Libraries/MBProgressHUD/MBProgressHUD.m