Conflict with HoloEverywhere library.

Add 'psts' attribute prefix to avoid conflict in dividerPadding attribute when using this lib together with HoloEverywhere library.
Added prefix to all attributes to make them look all the same, instead of adding the prefix only to dividerPadding. 
My project was failing to compile because HoloEverywhere was giving this error:
attrs.xml:24: error: Attribute "dividerPadding" has already been defined