Added new log appender that logs into database
Merge origin/master
Added read only database access
Added entity class and DbAccess for new log table a
Do not use new database appender
Test context update, the creation of DataUnits moved into DataUnitFactory, it's now possible to set working/user/global/result directory
Added LogAccessor for new logging
New Log class and DbLog added into persistance and context, ExecutionListener update so it can easily be used with new logs table