[cairo] Another set of OSX Build Instructions

[Travis Griggs]

I've been playing with refactoring build instructions found on the  
wiki out of the downloads page, and on to a separate Building page,  
with recipes for doing different builds.

I've just finished http://cairographics.org/end_to_end_build_for_mac_os_x/ 
  and would love to hear any feedback before writing up the end-to-end  
version I have for win32. It would be nice to kind of templatize  
these. I've begun a rudimentary page to act as a list of these (http://cairographics.org/building/ 
).

--
Travis Griggs
Objologist
My Other Machine runs OSX. But then... so does this one.