Refactored Sift

Added a debug=true get parameter check, if ?debug=true is set on url on a page using sift,
it will display the specific ask query created.

Added additional property parameter structure and a new parameter values which overrides
values suggestions found through smw.

Example syntax:
?Property=Text;values=overridden value 1, overridden value2....
!Property=Text;values=overridden value 1, overridden value2....
?Property;values=overridden value 1, overridden value2....
!Property;values=overridden value 1, overridden value2....

Change-Id: I90c2d4e8b797bdf4d29d1808e780b7bfabd418fc