Merge pull request #1 from garethgreenaway/master

Adding Carousel and other bootstrappy goodness, Thanks G
Merge pull request #2 from garethgreenaway/master

update to sign code.
Changed sponsorship image url to relative path
Added current sponsor images
Image Cleanup
renamed all images to PNG to keep it simple.  Added sponsor logo columb on left.  Fixed formating for the page.  Moved the carousel transition to be a fade rather than a slide, hopefully to allow smoother use on the raspberry pi.