support for layout direction

[bluemix]

I am using this very good library, but the problem I am facing now is that, I am using an Arabic interface, and I am getting an LTR direction in the tabs, instead of the RTL.

[bluemix]

I did it by having the onLayout(boolean changed, int left, int top, int right, int bottom) method being commented.

[RobotAmiee]

Sorry for late response, I am busy these days, so I don't have much time to take care of this project, but I will add your pull request later. Or you can add your pull request if you solved your issues, so others can benefit from your code.