Improve topic manager communications
Improved RPC comms; Added example getAttributes to dstopcimanager
bumped
DsTopicManager fixes
Custom attribute handling improved
Added caching to topic manager factory!
Improved caching
Merge remote-tracking branch 'remotes/nzfarmer1/master' into temp_merge

Conflicts:
	tlayer.py
	tltopicmanagerfactory.py
	topicmanagers/digisense/dsdevicemapdialog.py
	topicmanagers/digisense/dsfeaturedialog.py
Some more merge fixes
Fixes for merge operation