fixed the time offset
fix up, down, remove icons for pixel-classification workflow #139
Don't let the user edit sigma headings, fixes #52
LabelingGui: allow the ui to not have a add label button

If the .ui file does not provide a "AddLabelButton" button, disable
that code path in labeling gui.

This is needed for carving.
fix feature table widget: adapt gui test to actual ilastik usage
carving: remove benchmarking info from gui
tracking: force5d to allow for 4d data
Merge branch 'master' of github.com:ilastik/ilastik into public_master
only show "current view" combobox box when necessary (>=2 images)
Stub for providing an "About ilastik" dialog, see #156
data selection: disable remove image button if not applicable
minor: add ... to button which will bring up a dialog
Tracking: changed tab order
tracking: ranges for fov/time can now only be selected consistently
tracking: added some exception handling with error message dialogs
tracking: added tooltips to parameters
use the default font for applet names in the applet drawer

In practice, this makes the font size smaller than it used to be.
add help menu again after project has been loaded
tracking: improved export of tracking results
fix typo