[refactor] migrate to bootstrap 3 step 1

- just index.php for now
- new grid structure
- nice unlock-alert
- lots of small fixes
[refactor] footer has <hr> and spacing
[refactor] remake rest of the site
[refactor] redo 'Partner' showcase
[refactor] #fix 'christian storch' banner (no repetition)
[refactor] remove assets from repo (now installed via bower)

see the README
[refactor] navbar changes

now it breaks ok