Major UI restyling

Add a better UI look and feel, started implementation of the find
torrent modal (needs proper a proper torrent modal view) and added the
progress bar to the torrents overview. Clicking on an individual
torrent needs to display a modal also!

Next steps are:

- Add a modal view for torrent search
- Add a model for torrent info
- Implement regions for the nav bar and global loading of pages
- Style nav bar links to active based on url
- Implement torrent search functionality