Removing static button images and using Quartz to render

[davisjp1822]

Howdy-
Nice library! Thank you for posting it to Github.

Would you be willing to consider a Pull Request that removes the static images used as the backgrounds for the button states and instead uses added properties and Quartz rendering to change the appearance of the buttons? For example:

[jasarien]

Sure, open a pull request and I'll give it a review.

[davisjp1822]

Brainstorming on an elegant way to do this here. Would it be acceptable to add two properties to JSTokenField.h for the button customization? These two fields would be "buttonBackgroundColor" - which would disable the "setNormalBg" and "setHighlightedBg" calls in JSTokenButton - and "buttonCornerRadius", which would do the same. This is the straightforward approach, but I am not sure if it fits your coding style. What do you think?

[jasarien]

Yeah, I think that would be a decent approach.