Merge pull request #132 from aroig/undo-tree

add undo-tree faces
Merge pull request #135 from aroig/fontlock-inherits

fix inherits from font-lock
Merge pull request #133 from aroig/shell-mode

add shell-mode faces
Merge pull request #136 from aroig/org-mode

add some org-mode faces
Merge pull request #134 from aroig/speedbar

add speedbar faces
Merge pull request #138 from aroig/coq-proofgeneral

Coq and proofgeneral themes
[Fix #139] Fix typo in face name
add zenburn-fg+1 and zenburn-bg-2 for white and black

So that we get rid of explicit color literals