Simple startup script to install necessary software on google compute engine.
Updated startup script.
Documentation Updates.
Moved scipy direct code to own function.
Added pymumps direct solver backend.
Removed PubSub based communication.
callHooks generalizes some of the hook calling code in Optimize and Inversion
Merged in GCEtools (pull request #29)

Merge GCE tools.
Changed to generic bitbucket git repo.
Added matplotlib into the startup. SimPEG needs it.
Added hook method to utils so that we can hook new methods dynamically into the classes.
Merge branch 'develop' of https://bitbucket.org/rcockett/simpeg into develop
Documentation updates to optimize. Updated the hook method.
TimeSteppingInversion and Estimate Initial Beta based on eigenvalues comparison.
Documentation on how I am picking the initial beta.
Multiple RHS using mumps backend.
Raise an exception if name is not provided when hooking a lambda function.
bug fix, we were sourcing the wrong file.
Merged in pyMumpsSolver (pull request #30)

Mumps backend in solver class.
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