Merge pull request #4 from skygate/develop

Develop
added migrations to gumtreecrawler
Merge branch 'master' of github.com:skygate/LiveHe.re into develop
added solr to gumtree crawler only for three fields, added gumtree id
added migration for gumtree item id
added return data solr
Merge branch 'develop' of github.com:skygate/LiveHe.re into develop