fixed little bug, noted some ideas
implemented caching mechanism
changed the way the bash-completion works
improved module and script

* enhanced POD in Mensa::Dresden
* improved filter-option handling in mensa script
Merge branch 'develop' of github.com:8ware/Mensa-Dresden into develop
added Utils-module and some tests
improved mensa script

* moved load_config to Mensa::Dresden::Utils
* added improved command line argument support
* added dependency to README
wrapped output of the offering
none noteworthy changes