Add article detail view
Imports cleanup
Cleanup style; make article a ScrollView
Add home up button
Much features, wow

* Turn ArticleFragment into a Pager
* Fix bug where the list of articles wouldn't reload when going back to
  it.
* Update timestamp formats to be nicer
* Some minor style cleanup
Add Asset and AssetSize models, begin adding assets to template
Make the list a grid view; add assets, cleanup styles
Add Asset caching, style cleanup
Switch to ImageLoader for handling images; remove unused files
Add drawer navigation
Add fonts; add async body parser
Remove Drawer from Single Article, replace with back button. Fix links.
Retain image ratios, fill in space
Better nav drawer background & cleanup
More fluid handling of article fetching in List view.
Move API response handler into a private class
Work on fixing pagination
Work on infinite scroll for single article view