ofTrueTypeFont parity methods

[prisonerjohn]

I added some methods to make ofxFontStash hot-swappable with ofTrueTypeFont. I also added Xcode project files for the example.

[armadillu]

Hey Ellie, just a couple of things:

the Xcode project expects ofxUnicode to be sitting in example/src, instead of ../../addons which makes more sense to me. I don't know what the standard it for this, but somehow it never works and that's what I avoid having Xcode proj files in Github

the src has MEASURE_PERFORMANCE defined by default, adding more dependencies... I would comment that line out.

Also, the merge itself doesn't compile but its and easy fix;

[armadillu]

Also, as you already started ofTrueTypeFont parity, maybe it makes sense to subclass it. Ill look into it

[prisonerjohn]

Good catches, I forgot to double-check the example after making my changes. It should be fine now.

[armadillu]

sweet thank you very much!