fix #398 add lacked form to _card_form.html.slim
Merge pull request #401 from mozilla-japan/task398

fix #398 add lacked form to _card_form.html.slim
re-implement derivating cards #404
Merge pull request #405 from johnny-miyake/derivatings

re-implement derivating cards #404
fix #402 no tag form in note_card/project
Merge pull request #403 from mozilla-japan/bug402

fix #402 no tag form in note_card/project
fixed #334 install select2-rails
Merge pull request #406 from mozilla-japan/task334

fixed #334 install select2-rails
fix specs for travis CI
Merge pull request #407 from johnny-miyake/fix_specs

fix specs for travis CI
task #400 state, transition, annotation の基礎工事