Updating music libary via beets
Export XDG_CONFIG_HOME Environment Variable

- Via the XDG_CONFIG_HOME Environment Variable I defined a location
  where the applications store there config-files. The Environment
  Variable is following the freedestop.org standard.
Adding functionality the plugin managment-script

- Now it's simple to update the plugins as submodules.
- And the script has now a better name.
- Also I literate through the CLI-Paramater Arguments to better control
  the plugin via the Commandline