Fix low version compatibility

[darktiny]

Method "removeOnGlobalLayoutListener" is API Level 16

Method "setProgressColor" in RoundCornerProgressBar class is wrong.

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    layoutBackground.setBackground(gradient);
} else {
    layoutBackground.setBackgroundDrawable(gradient);
}

Please fix it.

Nice library. Thx.

[GinRyan]

Very nice.

[akexorcist]

Arrr. I fotget it. Thanks guy!!

I will fix this with new library feature.

[first087]

I fixed it and create pull request for @akexorcist

[akexorcist]

v1.1.0 is coming! Check it out!