first version of 'labels have changed' dialog
do not print gui-only features in object report
remove entries with missing values from training and prediction. Not removed from labels yet
remove debug prints, move black label to 15 and the color table to objectClassificationGui
set the channel in test treshold
Merge pull request #311 from burgerdev/pr-guimsg

first version of 'labels have changed' dialog
add test features
use volumina capabilities for better data range handling
move channel selection and smoothing into the 5d operator
add one-level threshold and a test
(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