Add better support to set themes.

[CestDiego]

Loading another theme in the dotemacs/init function is not enough
http://i.imgur.com/6iijztH.jpg

Somehow the colorschemes defined in solarized-light are not redefined by zenburn, so maybe a way to tell spacemacs to load zenburn the first time instead of solarized-light? That could solve it

[syl20bnr]

Did you try to disable the current theme first in dotspacemacs/config ?

(disable-theme 'solarized-light)
(load-theme 'monokai t)

[syl20bnr]

Ok same things.

So I'm divised on this issue: the right fix is to support term faces in monokai.

[syl20bnr]

Seems that monokai and zenburn miss this face (taken from solarized):

     `(term ((t ( :background ,base03 :foreground ,base0))))

[syl20bnr]

Or the other way around, solarized misses:

   `(term-default-fg-color
     ((,class (:inherit term-color-white))
      (,terminal-class (:inherit term-color-white))))

   `(term-default-bg-color
     ((,class (:inherit term-color-black))
      (,terminal-class (:inherit term-color-black))))

[syl20bnr]

I will try to fix it in solarized.