[NEW] behavior property
[REFACTORING] progressStripe* => stripes*
[UPDATE] documentation
[NEW] YLProgressBarBehavio rIndeterminate
[NEW] YLProgressBarBehavio rWaiting
[NEW] YLProgressBarStripesOrientation vertical
[UPDATE] documentation
[UPDATE] Readme
[UPDATE] minor changes
[UPDATE] cocoapods spec file
[UPDATE] documentation