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 
Nah, not really. This begs for creating a designated function for this. Leave it alone then and create an issue for me to have a look at it.