Merge pull request #3 from qbio2014/richard

added coloring and plotting utilities
Merge pull request #4 from qbio2014/richard

Richard
Merge pull request #5 from qbio2014/richard

fixed child parent assignment
Merge pull request #6 from qbio2014/richard

added rudimentary multi-channel support (in calc_shifts)
Merge pull request #7 from qbio2014/richard

coloring trees, fixed h5 read in for images
Updated filter functions and added histograms

Filter objects with multiple properties.
Inspect histogram of properties
Merge pull request #8 from qbio2014/sebastian

Updated filter functions and added histograms
images are now loaded from file on demand