increased performance of events/eventmanager by changing stl containers and
reducing safety (e.g. no more schema checking). Events can have a maximum
of 10 entries each (e.g. call addVal 10 times).
fixed sqliteback tests. renamed Event::List to Event::Vals
more performance enhancements to events
Merge pull request #488 from rwcarlsen/faster-events

increased performance of events/eventmanager. limits number of event description values (columns in a row) to 10.