modifies vtk cmake to disable tk and provide information on the location of vtk libraries
ilastik: Updated paths to workflow files in launch scripts.
Use openBLAS by default, but provide WITH_ATLAS to switch
added dependencies to ilastik and VIGRA
changed yapsy download URL (old URL didn't work)
merged with FlyEM master
added -DVIGRA_VERSION=... to select a specific commit
added -DILASTIK_VERSION=... to select a specific commit
updated startup scripts
changed vigra update command