Animation fix and small indeterminate mode improvement

Animation fix
When using DACircularProgress with MWPhotoBrowser (or other recycling pages photo browser), animations starting from setProgress and setIndeterminate interfere with each other (and/or themselves) and should be removed before starting new one.

indeterminate mode improvement
This for enabling "chrome" style spinner, which is rotating counterclockwise when resolving host and clockwise when loading page. Some constants such as DAIndeterminateClockwise should be added I think.
enum {
DAIndeterminateNone = 0,
DAIndeterminateClockwise = 1,
DAIndeterminateCounterclockwise = -1
}