mongo-alignment: Added fetch method in FileWSServer
catalog: All folders' path ends with "/"
Merge branch 'feature/catalog' into feature/MongoAlignments
app: renamed OpenCGAMain to OpenCGAStorageMain.
mongo-alignment: Load alignments improved. IndexedAlignmentDBAdaptor.mongoManager is static.

TODO: Add --dbName argument. Store "dbName" in catalog for every indexed file.