Add rangy file rangy-selectionsaverestore.js to the dependencies

[Waxolunist]

Wysihtml5 does this as well. see https://github.com/Edicy/wysihtml5/tree/master/lib/rangy

Maybe this resolves some issues with the cursor not blinking after inserting a link.

[Waxolunist]

Using now delivered rangy libraries. 075e98e

[Waxolunist]

The development of bootstrap3-wysiwyg will be continued in a new repo: https://github.com/bootstrap-wysiwyg/bootstrap3-wysiwyg
@schnawel007 and @Waxolunist are bundling development forces for an even better editor.
This issue will be continued here: bootstrap-wysiwyg/bootstrap3-wysiwyg#96