Add counter_cache for Address and Contact
Refactor students index and fix eager_loading
Add sample data, create gaku:db:reset rake task
Rename rake task gaku_sample:load to gaku:sample:load
Add rake-progressbar
Paginate Teachers
WIP : Improve student db queries
Merge branch 'counter_cache' of https://github.com/kalkov/GAKUEngine into counter_cache

Conflicts:
	admissions/app/views/gaku/admin/admissions/_links.html.slim
[wip] counter cache and disposals for address
Change counts in students/_tabs
Merge branch 'counter_cache' of https://github.com/tapalilov/GAKUEngine into counter_cache
Fix spec/requests/students/class_group_enrollments_spec
Merge branch 'counter_cache' of https://github.com/kalkov/GAKUEngine into counter_cache
[fix] failing specs for delete primary addresses
Add a rake gaku:reset_app task
Add addresses_count to Campus
Merge branch 'counter_cache' of https://github.com/tapalilov/GAKUEngine into counter_cache

Conflicts:
	core/app/controllers/gaku/addresses_controller.rb
Fix a merge mistake
Add counter_cache for notes
Refactored conn between Student and Guardian, write counter_cache specs