Add Bootstrap 3.1.1
Add FontAwesome 4.1.0
Update jQuery to 2.1.1
Switch to using Bootstrap

- Now actually responsive!
- Adds sidebar
  - Login, takes you back to the same page
  - Splits to have event info on top of page, login below page
  - Combell logo disappears on mobile, as it's directly above the footer which also contains it
- Added a link to github in the footer (left)
- Nicer pager
- Clearer (actionable) "I will be attending"/"I attended" text+buttons
- Short URLs now have a "Copy to Clipboard" UI
  - uses flash but:
  - is hidden on mobile/tablet
  - will highlight the text in the input when focused, or clicked without flash
- Comments have a new interface
  - Supports gravatar
  - Comment shown above author/date/via
  - via is hidden on mobile
  - When ratings are shown they are also responsive:
    - Horizontal/on-top for desktop
    - Vertical/left for small/tablet
    - Vertical/on-top for mobile
- Twig will check for local images before linking to the old joind.in site
Strip down bootstrap to the essentials
Make the key responsive
Disable zoom
Add gulp to minify/concat JS/CSS
Add `watch` task
Revert "Disable zoom"

This reverts commit 85c73a25d3713384caf6dc4693c61f3dbbd812b0.

Conflicts:
	app/templates/layout.html.twig
Add a header to state files are generated
Fix bug in FF where it scrolls to the bottom
Switch to PNG images
Customize FontAwesome
Rework comments to use less space
Fix search form to point to `/search/events`
Fix pager UI when there is no next page
Fix showing of commas between speaker names
Tighten up margins, especially in Event view on mobile
Save events found by search to the local data store.