Added base class logic for Expando based models.

Removed two obsolete/outdated methods in Survey Logic. The updateSurveyRecord can be found in the SurveyRecord logic.

Removed obsolote method call in Program View.

Clean up and other fixes for Survey modules. Reviewed by: Lennard de Rijk

Implemented the takeGet view for Surveys.

Fixed multiple typos in Survey tooltips strings.

Added skeleton for the take view and its template. Also fixed the sorting of imports of the Survey View.

Move getMenusForScope to the end of the View class. Adhering to our principle that we the methods we use for generating our menus can be usually found at the bottom of the View class.

Changed the Survey public view to give a preview of the Survey. Also changed the access rights for deleting a Survey because of the possible invalid references problem. Added two TODO's to the _public method. The first one involves enabling the SurveyForm to generate a form without passing along the Logic since it is only used to retrieve the Survey entity which we already have available. The second one involves a brief discussion about the getFields method's functionality and name.

Removed activate grade URL pattern from Survey View. The remaining methods will be ported over in a patch from Ajaksu.