Group projects together into workspace

Linking `LiferayNativityFinder.bundle` into `LiferayNativityInjector` via a custom-hacked Copy Resources entry is hacky and confusing for users.

I've just created a workspace that includes both projects in the `mac` directory. This new LiferayNativity workspace unifies the Derived direcotories for the two projects. `LiferayNativityInjector` now uses an extra scripted build phase step to copy the `LiferayNativityFinder.bundle` into its product's (`LiferayNativity.osax`'s) `Contents/Resources` directory.

This configuration is more portable.