Merge pull request #94 from LMMS/routing

Twig Templates + Silex Routing
Typo
Attempt to fix download buttons

Please don't break the site... please don't break the site... (patching
blindly)
Don't use existing key 'url' for download link
Footer fix
RemWiki fix
Remove explicit numbering
Syntax highlighting
Add index.php fallback instructions
Update README.md
404 page: remove whitespace, center text
Make "show" link consistent with front page
Bogus commit 1: Testing 500 errors
Bogus commit 2: Testing 500 errors
Bogus commit3: Testing 500 errors
Bogus commit4: Testing 500 errors
Remove user_agent error from nginx logs
Show download links on error page until @Lukas-W fixes it
Readme: Update Nginx config
Catch Github API exceptions