Fixed parent logging issue.
Added scheduler and UI changes.

- Fixed position storing while opening a file
- Added a simulation description field to the globals panel
- New scheduler.terminate() function added to stop simulation on call
- Trace events working
- Multiple edges from node x to node y now considered
Fixed callback issue with deleteAnchor when loading from for loop
Removed deleteAnchor from edge editor (param)
Pending edges added
Multiple edge highlighting bug fixed
Optimized pending edges
Added anchor to show which edge is currently being edited (if multiple edges)
Merge branch 'gh-pages' of https://github.com/abhinadduri/tao into gh-pages