Some improvements to the GraphEditor (display overlaying edges, adding edges, edit edge values)

git-svn-id: http://dev.eclipse.org/svnroot/technology/org.eclipse.stem/branches/STEM_1_2_3@2583 92a21009-5b66-0410-b83a-dc787c41c6e9
4 files changed
tree: 2b74da18def7701074ed407c5c3c76141da10553
  1. analysis/
  2. core/
  3. distributed/
  4. docs/
  5. features/
  6. models/
  7. releng/
  8. tests/