Added the Solarized Dark/Light theme

Both Solarized Dark/Light theme are in the Top 10 pick list, and they were the only two in the list which was not bundled by eclipse-color-theme plugin. I think it would be great to bundle them directly!

However, I found there exists various modified version on the http://eclipsecolorthemes.org/ , I'm unable to determine which one is more precise (from the http://ethanschoonover.com/solarized 's point of view) than others. I just picked who has top downloads.

By design, the color scheme between Dark and Light should be consistent excepts the dark/light background. The top downloaded dark / light theme broken this rule, but they actually were the top picked.