Add Tomorrow Night Bright as Eclipse Color Theme.

I just modified the Tomorrow Night XML file from [eclipsecolorthemes.org](http://eclipsecolorthemes.org/?view=theme&id=1867), as that was a lot easier than using the .epf file. It is worth noting that the theme id is still set to the normal version, and the preview in Eclipse is wrong, but it still works great.

This is due to me not submitting it through eclipsecolorthemes.org, as I didn't want to put my name on the theme and take credit for the great work by @chriskempson.