Added OpDvidVolume and support for it in OpInputDataReader.py
Correct the path to the exception class
Added submodules directory and added dvidclient to it.
Don't choke if dvidclient isn't available.  Just proceed without OpDvidVolume
debug log statement.
Merge branch 'master' of github.com:ilastik/lazyflow
dvid support: Avoid deprecated BaseException.message attribute.
remove newline on import
Merge pull request #117 from burgerdev/remove_import_newline

remove newline on import
Fix import order for submodule imports.
submodules: Updated dvidclient.
utility: pathHelpers: getPathVariants() interprets url paths as 'absolute'
OpInputDataReader: FilePath input can be a dvid URL.
submodules: Updated dvidclient
submodules: updated dvidclient
tests: Fixed testOpDvidVolume
pathHelpers: quick-test checks that everything works for urls, too.
OpInputDataReader: Minor import cleanup.
Added OpExportDvidVolume.  Used it to add dvid support to OpExportSlot.
opExportDvidVolume: Added transpose_axes arg.
opExportSlot: When exporting to DVID, assume the user provided C-order axes.