sequence diagram poc 1
corrected after JSLint
Sequence diagram generation enhacement
Merge pull request #1 from sboyina/dev

Sequence diagram generation enhancement
Fix for tree expand/collapse

fix for issue :  tree is not expanding/collapsing when user clicks on
the icon.
Merge pull request #2 from sboyina/dev

Fix for tree expand/collapse
Merge pull request #3 from sboyina/master

Sequence diagram generation enhacement