Spire now building/correctly rendering on iOS.

Now we have a platform with which to test OpenGL ES rendering. There
are a number of things that remain to be done on this platform but
will be delayed in favor of getting SCIRun5 up and running. These things
are listed below.

1) Resource discovery (for shaders -- right now this is done 'hackily')
2) Ability to debug library generated by CMake toolchain.