Fixes #10. Add drag/drop reordering of graphs.
save callback on drop
just include sortable.js instead of whole angular-ui
Revert "save callback on drop"

This reverts commit c6752c6d76ed7b3e791362b8d3d4d47f5a0e7cce.
Merge pull request #12 from stuartnelson3/master

add support for drag n drop graphs