Added a configuration file for specifying Empire's and Metasploits API and RPC creds
Added the empire_agent_exec module: connects to Empire, generates a launcher and executes it
Minor bug fixes
Quick re-cap on the new features:
* Credentials and hosts are now stored in a database, the cme_db.py script can be used to query it
* Module system has been implemented allowing anyone to create payloads
* All underlying powershell code has been ported to a module
* The HTTP/HTTPS server now tracks connections: no more guessing when to CTRL-C
* All around better code quality, error handling and logging
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