Make portlets get bootstrap classes.

Note: The first portletItem still gets a top border.
We haven't found a proper way to apply the style
.panel-heading + .list-group from panels.css:46.
Merge pull request #293 from plone/fix-portlet-styling

Make portlets get bootstrap classes.
tinymce styles fixed in upload/links modal

- autotoc: add example to render tabs + automatically disable scrolling if pattern elements has "autotabs" class
- add separated template for image upload, use autotoc to get tabs from fieldsets, improve styles
- tinymce uses autotoc so make sure pattern.tinymce.less includes pattern.autotoc.less
Toolbar design and font
Merge pull request #298 from plone/ramon-wednesday

Toolbar design and font
Merge pull request #295 from plone/simahawk-tinymce-modal-improvements

Improve tinymce links/images modals + improved autotoc docs
color changes to improve a11y and pass validation
Merge pull request #294 from plone/polyester-a11y-fixes

color changes to improve a11y and pass validation
Related Items: add an example with a restricted maximumSelectionSize
Merge pull request #299 from plone/related-items-single-selection

Related Items: add an example with a restricted maximumSelectionSize
on each commit to master commit bundles to related projects
Merge pull request #289 from plone/garbas-autocommit-bundles

on each commit to master commit bundles to related projects
Modal correct position + tooltip, move burgerbar to the left side
adding possibility to bootstrap mockup development environment with nix (``make bootstrap-nix``)
Merge pull request #303 from plone/ramon-thursday-1

Modal correct position + tooltip, move burgerbar to the left side
Merge pull request #305 from plone/garbas-nix

adding possibility to bootstrap mockup development environment with nix
Hiding the modal on structure pattern
rewrite of toggle pattern

- fixing toggling on same element
- removed menu, externalClose and preventDefault options
- add targetScope option
- add tests and make them faster
- complete documentation of options and provide more examples
Merge pull request #310 from plone/mrtango-toggle

rewrite of toggle pattern
Merge pull request #306 from plone/hide-modal-structure

Hiding the modal on structure pattern