added check for an empty list of objects after filtering
Merge branch 'sebastian' of https://github.com/qbio2014/cellTracking into ignacio
fixed check for an empty list of objects after filtering
Merge pull request #10 from qbio2014/ignacio

added check for an empty list of objects after filtering
Merge pull request #11 from qbio2014/richard

Richard
added get labeledimg