pep8 and bugfixing for metasploit pro
Refactor Metasploit skaldship and update/bugfix

This moves the Metasploit routines into a directory, refactoring it
for "Pro" and eventual "Framework" support.

Renames MetasploitAPI.py to MetasploitProAPI.py since we'll start
to use the existing python-metasploit library on PyPI for msfrpcd
communication instead.
rename get_config back to msf_get_config
Merge pull request #138 from grutz/msfpro_update

MetasploitProAPI refactoring