Fixes #7 - actually there was a mix-up between the objects in the global environment and the ones in gMCP:::gMCPenv.
Backslashes (as in "\epsilon") are now allowed in the graph description. Before this commit they could crash the GUI.
Print stack trace if there is a real error and not just the attribute missing.
Updated ToDo.
Added page numbers to citation Bretz, F., Maurer, W. and Hommel, G. (2011).
Fixes #8 - graph description is shown when selecting a graph object.
Updated NEWS and TODO.