Correct the path to the exception class
Merge branch 'master' of github.com:ilastik/lazyflow
Merge branch 'master' of github.com:ilastik/lazyflow
update interpolated filters
Ensure that submodule discovery works even if lazyflow is accessed via symbolic link.
submodules: If the submodule directory isn't found, ignore the error and just skip submodule discovery.