Merge in upstream, add colour-picker.
Merge remote-tracking branch 'remotes/Emoncms-Upstream/rework'
Minimal bar gauge thing.
Bar display now works.
Better configuration descriptions.
Merge branch 'rework' of https://github.com/emoncms/emoncms
Merge branch 'rework' of https://github.com/emoncms/emoncms
Merge pull request #144 from fake-name/master

New Bar widget and colour-picker for setting plot colours.