Selectable colour schemes

[scudderfish]

From a comment on play.google.com :-

Pucci on Wednesday, August 29, 2012 at 14:38 Samsung Galaxy S (GT-I9003L) Version 4.2.2 Spanish
Really good APP for Logging display I have tested this soft in my pug 404 1979 with MS3+MS3X, it works fine, nice refresh rate. The gauges works really nice, fast respone, all the gauges can be customized so it is powerfull for cars without dashboard. cons: can not modify the colour scheme. I think it could be good for daylight change the scheme to another set of colours.

Probably need a 'light' scheme (black on white) and a 'night' scheme (red on black) as a minimum.