Library reorg

Changing a few things about the way the libraries are staged for building and consumption:

- Moving header search path configuration from "User header search paths" to "Header search paths".
- All library header files will now be deployed in Headers/[Project Name].
- Moved the copying of header files into a proper "Copy Header Files" build phase.
- Changed the build configuration to work with the 'install' action.

There's not a lot of net difference in the creation and consumption of the library archives; the new location of the header files is about it.  The native and hybrid templates have been updated to point to the new header file location.
Updating to latest Cordova commit
Merge pull request #365 from khawkins/library_reorg

Reorganizing the SDK library builds a bit