[coffee] handle hstore in forms
[controller] whitelisted dynamic params; suggested by rails core member
[view] handle hstore in views with forms and template
[locale] add locales for arguments
[migrate] add hstore for grading method arguments field
[view] refactor hstore arguments fields_for into partials
[gemspec] update phantom_form gem
[spec/requests] testing grading method arguments
[js] remove commented code
Merge branch 'master' into grading_method_hstore

Conflicts:
	core/gaku_core.gemspec