Cpsk datematch

* Plugin is now able to also match date when user specifies it in query. For instance `10.12.2014 bus z TO do BA`
* Also added more examples
* Don't throw exception when there are no results, rather return "Nothing found"

This closes #29 
Also, while we are at it, I'd personally very much prefer if we could have time in the format of `HHMM`, that is without the colon.