Added user-defined project setting to allow the bundle identifier to vary based on build configuration.

Debug, Ad Hoc and App Store builds will now have unique bundle
identifiers which will allow users to install all three apps
side-by-side. This will make testing development versus staging versus
production easier.
The "Release" folder in the build directory is now checked for header files during Ad Hoc and App Store builds.

Most static libararies have a Debug and Release build configuration.
Since these project templates do not have a Release build configuration
the header files for static libraries that have been added as a
dependency are not able to be found during Ad Hoc and App Store builds.

The header and user header search paths have been modified so that they
will look for a "Release" folder in the build directory which is
typically what is used for Ad Hoc and App Store builds.