gui: changed ROA toolbox icon back to the correct one
model dataflow: detect if the DataArray passed is not C contiguous

don't just ship the wrong data, but warn and send the right data, with slow down.

Fixes a (non-existent) problem when the new SimSEM was using data from HDF5 file (F ordered)
Merge branch 'master' of vpn.delmic.com:odemis