trims domain param
fixes according to pull request comments
Adds support for prerequisites.

- implement playlist handling the the javascript
- jshint fixes
- refactors prerequisites to use link-data
Fix screening-selenium generating to match the new selector

Introduced in walkthrough resources.
Merge pull request #21 from Pronovix/fix/444-screening-selenium-generating-to-match-the-new-selector

Fix screening-selenium generating to match the new selector
Merge branch '7.x-1.x' of github.com:Pronovix/WalkHub-module into 7.x-1.x
Clean up and add wires of prerequisite playing
Merge branch '7.x-1.x' into feature/trim-domain-parameter

Conflicts:
	walkhub.module
Merge branch '7.x-1.x' into feature/454-play-prerequisites-during-screening-automatically
Implement playing through prerequisite steps
Automatically play all prerequisites if _play_prerequisites get parameter is passed
Add parameters of the prerequisites

Refactored attaching data attributes to be more readable.
Fix clicking on "Next" button between two walkthroughs
Add phpunit as a dev dependency
Fix domain trimming
Merge branch '7.x-1.x' into feature/454-play-prerequisites-during-screening-automatically
Merge pull request #22 from Coornail/fix/458-domain-trimming-in-walkhub-module

Fix/458 domain trimming in walkhub module
Merge pull request #23 from Coornail/feature/454-play-prerequisites-during-screening-automatically

Feature/454 play prerequisites during screening automatically
First prototype of the recorder.
Merge branch '7.x-1.x' of github.com:Pronovix/WalkHub-module into 7.x-1.x

Conflicts:
	walkhub.module