moved stuff to lazyflow, extended fillmissing gui
Merge pull request #423 from burgerdev/pr-fillmissing

FillMissing has detection layer and command line option
object extraction: added vertical spacer
manual tracking: added log output to gui
manual tracking: added gui control for automated tracking window
manual tracking: abort if overlap is too small
manual tracking: increased maximum for window size
manual tracking: added button to find untracked cells
manual tracking: moved automatic tracking to subthread, adjusted error handling
manual tracking: remove subtrack extended
manual tracking: some minor bugs
Merge branch 'master' of github.com:ilastik/ilastik into counting
Ensure that all input images must be 2D and have the same number of channels
counting modify boxes appeareance globally
counting modified default parameters