commons metadata handler
aggregator updated. not tested.
commons metadata handler
aggregator updated. not tested.
fixed bug mongoAdapter , ir updated
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Persistence/src/main/java/com/sigmacr/domain/Product.java
aggregator completed. Alpha test ok.
Merge remote-tracking branch 'upstream/master'
product constructor added
Merge remote-tracking branch 'upstream/master'
added product category hint
Hasintha clash. Metadata.category_hint
Merge remote-tracking branch 'upstream/master'
Hasintha clash. Metadata.category_hint
Merge branch 'master' of https://github.com/SigmaCR/sigma-cr