use volumina capabilities for better data range handling
(object classification gui message) better listing
changed object feature interface
made distance transform isotropic
warn on bad values but do not remove
object prediction cache is now threadsafe. fixes duplicate computation bug.
added comment
reduced code duplication
SerialDictSlot can save recursive dictionaries
margin selectable in dialog
simplified extent. removed it from the plugin interface
Merge pull request #313 from burgerdev/guimsg

Improved listing in the GUI message (pop-up window)
remove dependency on NormalizingSource
Merge branch 'master' of github.com:ilastik/ilastik
fixed printing object features
only pass label image to plugins. let them do their own distance transform.
removed 'channel is 1' hack; should work gracefully now
LayerViewerGui: Activate volumina multichannel support for more than four channels