Move the documentation generation to its own target. While short lived the idea of having the documentation generated on an arbitrary target was a bit misguided. Instead having a dedicated target seems like a much better idea. This also allows us to abstract the script a bit and move some of the variables into the Docs target instead of being in the build script. This should also help out anyone who wants to use our Doxygen building target as an example as they'll have less work and script tweaking to do.
Move the documentation generation to its own target.
While short lived the idea of having the documentation generated on an arbitrary target was a bit misguided. Instead having a dedicated target seems like a much better idea. This also allows us to abstract the script a bit and move some of the variables into the Docs target instead of being in the build script. This should also help out anyone who wants to use our Doxygen building target as an example as they'll have less work and script tweaking to do.

schacon/cocoagit,schacon/cocoagit,geoffgarside/cocoagit,geoffgarside/cocoagit