ERT-545 - Plots should be ordered
ERT-557 - Added check for existence of data when reading from storage.
ERT-555 - Disable "Add case to plot" when 5 cases are reached
Merge pull request #422 from jepebe/ERT-555

ERT-555 - Disable "Add case to plot" when 5 cases are reached
ERT-570 - Plotting performance issues
Merge pull request #421 from jepebe/ERT-557

ERT-557 - Added check for existence of data when reading from storage.
ERT-570 - Plotting performance issues
Merge pull request #418 from jepebe/ERT-545

Ert 545 Reordering of plot data types.
Merge remote-tracking branch 'upstream/master' into ERT-570

Conflicts:
	devel/python/python/ert_gui/tools/plot/plot_window.py
Merge pull request #423 from jepebe/ERT-570

Ert 570 Plotting performance issues