Issue title: Add composer uid as a query parameter
 Issue body: Check this issue that also mentions the composer #333
 Comments: 
 Comment 0: It would be useful also search by composer name (from DoctorProxy).

CompoIndex.composser <DoctorProxy>
 Comment 1: TODO: test composer name in compo query
TODO: add to datavalue query
 Comment 2: TODO: test API with new params
TODO: add params to guide 1.1
{'source': 'GithubIssues', 'repo_name_with_owner': 'ppazos/cabolabs-ehrserver', 'issue_id': 243602650, 'repo_stars': 154.0}