Updating gradle config
Removed style Files
Adding ThumbSide, thumb moving right, left, both or none.
add build.gradle for building sample app
fix sample app
add method for determine if  input coordinate is between both thumbs
move thumbs when user moves between thumbs
Merge pull request #1 from fly1tkg/develop_slide

add gradle file for sample; fix sample app; move thumbs user moves between thumbs
prohibited move when bar moving between leftX and rightX