Improvement and bugs fix

1.bugs fixed:

1. when call method setProgress( ) , thumb will be changed smoothly when has a attr :seek_smoothly. See issue: #113 by @daodao917
   2)fix crash when use in pre-lillopi device. See issue: #114 by @swapnilappsplanet

2. Improvement
   format faster when use in float type value. See PR #111 by @hexey
3. new Feature
   supprot Vector Drawable for thumb and tickMark, See issue #120 by @Danil4ever

thanks all Issues and PRs you submited.