Reorganizing themes

Previously, themes were in separate directories under vendor/ since
there were only 3 'collections' of themes that I had in the repo and I
needed to add all of these paths to the custom-theme-load-path.

I've moved these all under ~/.emacs.d/themes. I've also updated
emacs.org to only add this directory to the custom-theme-load-path.

Note: color-theme-ports was a git clone (with its own .git directory),
      so those files look like newly added files, but are really just
      moved out of that directory and then the directory removed.
Adding monokai theme for Emacs
Ignore more files!
Removing some whitespace