UK: filter forms by owner
UK: filter data endpoint by owner
UK: filter projects endpoint by owner
UK: code refactor
UK: compare sorted list
Merge pull request #381 from onaio/api-filters

add filter by owner for /forms /data and /projects endpoints, I will save my arguments about functions versus classes for another day
RR: add metadata json field in projects model
RR: test partial update for metadata field
RR: add project update info doc
RR: test for PUT project info
RR: add field to handle json data
RR: test for partial update to existing metadata