Synchronise and merge the pending changes

These changes contain the implementations of the following issues:
BASE-22 Support Map/Dictionary Attribute type
BASE-23 Improve the logger
BASE-24 Support the GroovyObject
BASE-25 Make the Connector Bundle loading consistent
Merge pull request #9 from laszlohordos/1_4_X_Y

Synchronise and merge the pending changes
Merge remote-tracking branch 'tirasa/1_4_X_Y' into 1_4_X_Y