Added empty .py files as placeholders for  retrievability calculator functionality
Merge branch 'master' of https://github.com/leifos/ifind
Merge branch 'master' of https://github.com/leifos/ifind
to resolve conflicts
Checkng for achievements at game over.
Merge.
Merge branch 'master' of https://github.com/leifos/ifind

Update before committing stub code for calculating accessibility functionality.
added stub code for retrievability calculator
updates to stub code for calculate retrievability functionality, improved structure for PageRetCalc and QueryGen
query generation methods and classes fleshed out, next step to issue queries to the engine
updated calc ret method to the point of issuing to the engine
updated generateQueries to return list of query objects instead of strings
Fixed bug in game_mechanics check for news badges.
Merge branch 'master' of https://github.com/leifos/ifind
Merging.
Added about us page.
Merge branch 'master' of https://github.com/leifos/ifind
a bit of refactoring

Conflicts:
	applications/rmiyc_project/populate_test_db.py
Minor changes to the retrievablity calculator
Merge branch 'master' of github.com:leifos/ifind
a bit of refactoring

Conflicts:
	applications/rmiyc_project/populate_test_db.py
Merge branch 'master' of https://github.com/leifos/ifind