removed directive to set viewport width to device width

doing this allows me to be able to an icon to home screen on iphone5
which will load in full screen mode
Merge pull request #76 from bulkan/viewport_fix

removed directive to set viewport width to device width
adding function to be able set button font size
added function doc comment
Merge branch 'glossy_button_features' of github.com:bulkan/limejs into glossy_button_features