[api] move maintainer/owner handling into own modul
[webui][api] Introduce comments for projects, package and requests in the API and display them in the UI
[api] fix testing
updating spec (ruby 2.0 and sphinx)
[api] Removed non needed call to Relation#all (deprecated)
[api] Reindex sphinx database every hour
[api] Delta indexing added to sphinx (the straighforward way)