Clean Redmine 5 with ruby-dev

.gitmodules

Dockerfile

plugins/easy_mindmup/Gemfile

plugins/easy_mindmup/README.rdoc

plugins/easy_mindmup/after_init.rb

...s/easy_mindmup/app/controllers/easy_mindmup_controller.rb

plugins/easy_mindmup/app/helpers/easy_mindmup_helper.rb

...ins/easy_mindmup/app/views/easy_mindmup/_hotkeys.html.erb

...ns/easy_mindmup/app/views/easy_mindmup/_includes.html.erb

.../easy_mindmup/app/views/easy_mindmup/_js_prepare.html.erb

...s/easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.eot

...s/easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.otf

...s/easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.svg

...s/easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.ttf

.../easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.woff

...easy_mindmup/assets/fonts/EasyMaterialIcons-Regular.woff2

plugins/easy_mindmup/assets/images/person.gif

plugins/easy_mindmup/assets/javascripts/after_change.js

plugins/easy_mindmup/assets/javascripts/autosave.js

plugins/easy_mindmup/assets/javascripts/backup/last_state.js