Merge pull request #22 from MarcelCutts/master

Dave Allen adding moving day/night bands across map
Displayed hour is always in 24-hour format
Added some more explanatory comments to controllers
Added guard when calculated colour index is negative
No data has been replaced by 0 commits.
Added pluralisation.
Fixed default color issue.
Merge pull request #23 from jonnyarnold/master

Minor fixes
Merge remote-tracking branch 'ChronoCommit-Upstream/master'
Explained how to update the project page.
Made permission reqs clear