changed backward slashes to forward slashes
SyncedSliceSources now support partial syncing
adopted sync_along parameter in dirtypropagation test
support for through values caller override
Documented ImagePump
Merge branch 'master' into multichannel

Conflicts:
	volumina/pixelpipeline/imagepump.py
NavCtrl now contains imagepumps instead of only syncedSliceSource. Prerparation for per layer channel selection.
added layerChangeChannel() to navigationControler; gui multichannel support still missing
made volumeeditor multichannel-ready
added h5py to requirements to fix travis build
added libhdf5-dev to travis config to fix build
fixing travis build
fixing travis
h5 and stack export working
Merge branch 'master' of github.com:ilastik/volumina
added layername option to exportdialog
removed debug trace
adding the capability of the layercontext export to pass all channels to the export dialog
changing the exportDialog to use the valuerangewidget