Added simple mesh class hierarchy.

Currently only a spherical section mesh is included.
Changing event so it fits to the provided example stations.
Adjusting test case for the event
Fixing bug when passing a single string.
Small change to the time config location.
Moved time config to global config dict.

Only one configuration object is passed to each write. Thus everything
has to be stored there.
Added an example file.

I am still changing the API and just trying to find the best way to do
it.