Support for applying a control color scheme (i.e. giving the seekbar and buttons a tint color)

When adding methods in a category, always prefix with the project prefix, so in this case it should be gmf_applyTintColor - this way we are protected from cases where Apple might add this method in the future, which would then break or stuff. See: http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml#Category_Names