Merge pull request #73 from csanyiarpad/feature/491-walkthrough-listing-page-theming

feature/491: listing page for walkthroughs
Improves screening.

* better error handling
* variables named properly
* generates dummy screening node on walkthrough creation
Merge pull request #74 from tamasd/master

Improves screening.
Update Drupal core to 7.28
Hide the contents of CHANGELOG.txt
Add chosen module and library

https://drupal.org/project/chosen
Enable chosen module on site install and site update
Theme selectbox to match Walkhub style
Add og access module to dependencies and set subsribe permission to private roles.
Revert wt collactions feature and rebuild permission.
Merge pull request #75 from hosszukalman/feature/collections

Enable og access module ad rebuild node permissions
E_NOTICE fixes.
Merge branch 'master' of github.com:Pronovix/WalkHub
Removes unnecessary cases.
Merge pull request #76 from tamasd/master

E_NOTICE fixes.
Merge pull request #77 from Coornail/update/core-7.28

Update Drupal core to 7.28
Merge pull request #78 from Coornail/fix/158-confusing-collection-selection-widget

Fix confusing collection selection widget
feature/491: fix user name display in listing

Now the creator's name is shown (correctly) instead of the current user.