Added some helper text to the color palette.

-- it wasn't obvious what to do with the swatches in the palette
Added top/bottom-right text and front-printed text.

-- all labels are separated by \n's in the serialized data; now just
supporting 3 more
-- labels are now stored as an array internally
-- Fixed a bug where inserting a key would say "g:undefined"
-- Fixed a bug where you could have an invalid key selected after
editing the raw data.