Merge pull request #33 from Coornail/fix/384-broken-selenium-tests

Fix/384 broken selenium tests
Add Stage File Proxy module

There was a testing issue with missing files, that caused some problems,
adding this module to avoid it in the future.

Module is not enabled by default on purpose.
Fix walkthrough slideshows without step references
Merge pull request #34 from Coornail/feature/add-stage-file-proxy

Add Stage File Proxy module
Fixed form label theming problem (446,447)
Merge pull request #35 from Coornail/fix/417-can-t-reference-individual-walkthrough-screenings

Fix walkthrough slideshows without step references
Merge pull request #36 from csanyiarpad/fix/446-447-form-theming-problem-in-firefox

Fixed form label theming problem (446,447)
Add site title assertion to the base test class