find suggestions is moved to search collection from product collection by adding field titleNgrams in search collection and corresponding suggest handler

Conflicts:

	opencommercesearch-api/app/org/opencommercesearch/api/controllers/ProductController.scala
implemented code reviews; changed sku to skus
setting up read concerns for mongo
Merge remote-tracking branch 'upstream/develop' into develop
Merge remote-tracking branch 'upstream/develop' into develop
Merge remote-tracking branch 'upstream/develop' into develop
added preview in the processSearchResults since my env started giving compile error because of the previous pull requesthas this call
Merge pull request #95 from naveenhooda2000/develop

Develop