Export collections and og settings to the collections feature.
Revert collection feature during the site udpate.
feature/477: Creating Walkthrough default widget

* adding new library: reveal.js - recompiled in order to work fullscrren as we need it
* adding gulpfile for compiling sass files
* modifing iframe template to use the new library
* modifing walkthrough_slideshow module, to load slideshows when there are no screenshots
* adding new iconfonts (extending the existing ones, generated with icomoon webapp)
Delete old collection contents and content types.
Add a new view to list collection's items in the collection page.
Set the collection list block's place.
Export mani menu item for collections.
Revert global feature too because of the collection menu item.
Add pages and title field to collection block.
feature/447: default widget fixes.

Fixing errors from previous commit.
feature/477: default walkthrough widget.

fixing errors from previous commits.
Merge pull request #67 from csanyiarpad/feature/477-walkthrough-default-widget

feature/477: Creating Walkthrough default widget
Merge pull request #68 from hosszukalman/feature/collections

Feature/collections
Reset navigation links.
Merge pull request #69 from hosszukalman/feature/collections

Reset navigation links for collections
Remove content delete update hook.
Merge pull request #70 from hosszukalman/feature/collections

Remove content delete update hook.
Update resources submodule
Temporarily return an empty set for the step reference field for comments
Revert walkhub comments features