Merge pull request #20 from SignalK/master

Publish gnss changes
Merge pull request #22 from SignalK/master

update to head
Merge pull request #25 from SignalK/master

Publish to gh-pages
Post-rebase merge to bring gh-pages in line with master.
Update header to match signalk.github.io
Fix overly nested layout issue
Remove a bit of incorrect body style
Add Developers menu
Merge branch 'master' into update-layout
Merge pull request #34 from SignalK/update-layout

Merging with new Developers menu