patches for: bar() and barh() ignore rcparams patch.facecolor and patch.endcolor

Whoops. Forgot to include the patches for CHANGELOG and

    > API_CHANGES. I updated as well, and tested
    > the rest of the bar demos. Here's the combined patch
    > against 2515.

    > Sorry for the hassle, I'm a bit new at this.

OK, great. They are in 2516.