Create Vue files and use vue-loader plugin of Webpack

[martinRenou]

The changes are:

• configure Webpack so that we can load .vue files
• transpose old .js files containing Vue components into .vue files. It only results in splitting the template and the javascript into two separate tag elements <template> and <script> for each component.
• application_list_view.js -> ApplicationListView.vue
• user/views -> user/vue-components (to stay consistent with the admin)
• configurables.js -> vue-components/configurables/Resolution.vue
• user/models -> user/ApplicationListModel.js

[codecov-io]

Codecov Report

Merging #458 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #458   +/-   ##
=======================================
  Coverage   95.33%   95.33%           
=======================================
  Files          88       88           
  Lines        4077     4077           
  Branches      259      259           
=======================================
  Hits         3887     3887           
  Misses        138      138           
  Partials       52       52

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