Seems that $TMPDIR is not created automatically on the DAS4 slave nodes?
Also, cleanup fake $HOME after running.
Merge pull request #186 from whirm/fix_vnc_wrapper

Seems that $TMPDIR is not created automatically on the DAS4 slave nodes?
Create $TMPDIR only if the var is there.
Allow to not use a virtualenv on the remotes
by setting use_remote_venv to false.
Ignore Vim backup files
Add new experiment for credit mining
Increase runtime to 24 h
Disable X init threads, not needed
Run DAS experiment for 24 h
Add new conf for 3 concurrent Triblers