Merge branch 'ui-improvements' into 'master'

app/assets/images/Storage-UI.PNG

app/assets/images/file_bin.png

app/assets/images/file_dir.png

app/assets/images/file_empty.png

app/assets/images/file_img.png

app/assets/images/file_txt.png

app/assets/images/rss_ui.png

app/assets/images/submodule.png

app/assets/stylesheets/generic/forms.scss

app/assets/stylesheets/generic/typography.scss

app/assets/stylesheets/main/mixins.scss

app/assets/stylesheets/sections/admin.scss

app/assets/stylesheets/sections/tree.scss

app/controllers/admin/projects_controller.rb

app/controllers/admin/users_controller.rb

app/helpers/tree_helper.rb

app/views/admin/projects/index.html.haml

app/views/admin/users/_form.html.haml

app/views/admin/users/edit.html.haml

app/views/admin/users/new.html.haml