Fix for #1642 - disable multiple selection for now. We may want to come back to it later, though that would require new methods to be implemented.
Update version number in pom

Change-Id: I9fe8a3db4e309229e1dfcaad2e40627d814a5349
Merge branch 'hotfix/3.0.1' of git+ssh://github.com/cytoscape/cytoscape-impl into hotfix/3.0.1