Merge pull request #63 from FreifunkBremen/master

Show bottom line with sums in node list
Merge pull request #64 from FreifunkBremen/master

list: cleanup css, use nicer arrows for sorting, pre-sort by name
Use CDNs for external libraries, merge nodes.js into config.js
Merge pull request #65 from FreifunkBremen/master

Use CDNs for external libraries, merge nodes.js into config.js
Merge branch 'master' into bremen