color morphing for svg gradient in background for weather page.

fix memory leak for draw element of svg background.

more work on rendering for bg gradient.

get gradient transitions working with time.

more work on the response gradient (based on time).

fix for hourly forecasts time being offset incorrectly. more work on gradients.

finish v1 of background gradient transitions.
Merge pull request #17 from alekhinen/feature/responsive-gradient

color morphing for svg gradient in background for weather page.