GeoClaw on master currently broken

[Randall J LeVeque]

If anyone using geoclaw updates their master branch of amrclaw you will find that geoclaw stops working.  I merged in the adjoint flagging PR 

https://github.com/clawpack/amrclaw/pull/228

and am now trying to get the corresponding PR working on geoclaw,

https://github.com/clawpack/clawpack/pull/147

I thought things were working but I'm having problems so it might take another day or two to fix.

In the meantime, since geoclaw points to some amrclaw routines that expect an adjoint_module that is not yet in the master branch Makefile.geoclaw, it fails to compile.

Sorry for any problems this causes!

 - Randy