PackageManager now uses modules
Packages almost using modules...
Fixed #create_package
Internally look up current_shell using hostname instead of host label
#su now yields the shell that called it
Added .current_host
Updated docs
Pass the package type to Package
Cleaned up PM modules
Packages now use modules
Renamed #load_adapter to #load_strategy

Also allow for PM to take multiple strategies.
Added accessor for type
Apt and Dpkg are separateable now.
Fixed requires
Fixins
Services converted to modules
Users converted to modules
Groups converted to modules
Use current_host helper
Renamed file_system to file_manager