Updated iOS to use 3.4.9, added support for newer Unity Versions

Rebuilt the libCrittercismUnity.a library to use the current version of
crittercism (3.4.9).  Changed the unity scripts to give access to the
new functions and removed deprecated methods.  Added AppController.mm
files for specific versions of unity - 3.4.0, 3.5.6, 3.5.7, and 4.0.1.