Builder changes (multi-instance and restrictions) and Schema move

- Schema move
   - All schemas (both system schemas and metadata schemas) moved to http://sobekrepository.org/schemas
    - Updated all the associated writers to reflect this change
- Builder changes
    - Builder config file can have multiple connection strings to support multi-instance building
    - Build log moved to the database, rather than builder log files
    - Can add restriction (by BibID root) to inbound folders, to only allow resources with certain BibID roots
Merge branch 'master' of github.com:MarkVSullivan/SobekCM-Web-Application