Merge branch 'workflow-case-update'
Merge branch 'workflow-exception'

Conflicts:
	devel/python/python/ert_gui/tools/workflows/workflows_tool.py
Merge remote-tracking branch 'upstream/master'
ERT-451 - Plot opening fails if no case and no simulations run. FIX: Check if no cases with data.
Merge pull request #326 from jepebe/ERT-451

Ert 451 Exception when opening plot with no plot data available.