Add workaround for AUFS bug; Change default IPython Image.
Add workaround for AUFS bug; Change default IPython Image.

mwolfien/galaxy-rna-workbench,bgruening/galaxy-rna-workbench,mwolfien/galaxy-rna-workbench,bgruening/galaxy-rna-workbench,bgruening/galaxy-rna-workbench,mwolfien/galaxy-rna-workbench