Add a command line argument which lets us specify the location of the mastercoin-tools repository.
Added the optional tools path to calls to get_revision_dict.
Changes the output of msc_validate to rename the sell offer files
Merge pull request #1 from maddenpj/Terminology-Fix

Changes the output of msc_validate to rename the sell offer files
Merge pull request #3 from curtislacy/Specify-Directory

Add support for some new command line arguments to some of the python tools.