Added a pretty 'forward' button
Merge branch 'master' of https://github.com/pelikanchik/edx-platform
Merge branch 'master' of https://github.com/pelikanchik/edx-platform

Conflicts:
	lms/static/js/sticky-go-button.js
	lms/static/sass/course/courseware/_courseware.scss
	lms/templates/seq_module.html
(graph functionality)
(finished merging)
Hover message instead of edge labels
bug-fix
bug fix
bug fix
fixed edges coloring
Edge deleting implemented
Two distinct modes: "node editing" and "node dragging" implemented as proof-of-concept
Fancybox (beta), third-party js files
your scheduled portion of bug fixes
Different elements forms/colors depending on content
(yet another regularly scheduled bug fix)
Discarded idea about vertex size, added confirmation dialogs.
Merge pull request #63 from pelikanchik/bt-copy

Bt copy