Added docblocks to Colours class

Added PHPDocumentor comments to the Colours class to aid future
maintainability.
Added docblocks to Colours class

Added PHPDocumentor comments to the Colours class to aid future
maintainability.
Merging remote branch as part of a rebase attempt
Merge pull request #3 from simpleigh/colour_docblocks

Added docblocks to Colours class