Why the icons on the buttons are so small ?
Hi, Mike, I'm using this library and everything is perfect, except for a small observation on the buttons.

I explain here:

I have in my application buttons 50dpi (width) and 50dpi(height), this size is perfect for showing the icons of google material design (PNG), (I put in all the folders, the icon with all resolutions drawable-MDPI, drawable- hdpi..etc ...)

the icon is displayed perfect and almost fills the size of the button.

but if I want to do the same with the button of this library, the icon is very small, almost half of the other.

to summarize: 
with a button of 50x50 and using PNG images the icon fills the button perfect.
but with the button of this library the icon can barely be seen (to small).

Is it possible to assign in the xml, the resolution of the icon to display on the button?
the icon is automatically adapted to the size of the button?
