Cleaned up mobi1.6 model code

- Deleted unnecessary files
- Added mobi to Makefile
- Updated external_forcing_mobi.c to PETSc 3.4
- Added mobi run-time script 'control.in' to repository

On branch master
 Changes to be committed:

	modified:   driver/petsc3.4/Makefile
	new file:   models/petsc3.4/mobi1.6/runscripts/control.in
	deleted:    models/petsc3.4/mobi1.6/src/Makefile
	modified:   models/petsc3.4/mobi1.6/src/external_forcing_mobi.c
	deleted:    models/petsc3.4/mobi1.6/src/tmm_source_1.6.tar.gz