Fix for saving updated observations
Fixed bug in generating depth images from saved pointclouds
Added support for logging room sweeps into mongodb
Importing room observations from the databse and saving them to disk
Logging to database enabled by default
Bugfixes in loading metric map data from mongo and saving it on the disk
Deleting old data by default (instead of storing it in the cache to be uploaded to an ftp server)
Deleting old data by default (instead of storing it in the cache to be uploaded to an ftp server)
Merge branch 'hydro-devel', remote-tracking branch 'upstream/hydro-devel' into hydro-devel
Merge pull request #52 from RaresAmbrus/hydro-devel

Metric map <-> mongodb integration