[lib] refactor csv.rb
Merge branch 'master' of https://github.com/GAKUEngine/gaku_imex into show_import_information

Conflicts:
	lib/gaku/importers/students/csv.rb
[view] import file
[routes] import file check and import
[model] small refactor
[spec/lib] csv import
[controller] check action
[worker] students worker
[spec/feature] check importing information
[fix] proper naming of arguments
[gemfile] add rspec retry
[gemfile] fix gaku gem load path
[travis] add redis
[.rspec] remove from gitignore to show rspec documentation style in travis
Merge pull request #5 from GAKUEngine/show_import_information

Show import information