Ignore down repositories for ELPA

* config-misc.el (package-archives): Test at startup if the packages
  repositories are up before affecting them to `package-archives'.

  I've to do that because `marmalade-repo.org' is often down at the moment.
Disable `highlight-sexp-mode'

* config-lisp.el: Disable `highlight-sexp-mode'.
Bring my theme to Emacs24

* config-theme.el: Remove `color-theme' dependency and use the Emacs24
  theme style.
* tangotango-theme.el: Import `tangotango-theme.el', it's
  `color-theme-tangotango' without `color-theme.el'.
* elpa/color-theme-6.5.5*: Get rid of `color-theme.el'.
Remove temporary utility

* elisp/bbdb-to-org-contacts.el: Remove temporary utility.
Moar configuration
Prevent error

* config-multi-term.el: Avoid to set an undefined variable.
  `autopair-dont-activate' isn't defined in all version of autopair.
* tangotango-theme.el: Fix some magit's faces.
Put bindings in `config-binding'

* config-misc.el: Remove key-chord bindings for `ace-jump-mode'.
* config-bindings.el: Add key-chord bindings for `ace-jump-mode' and `require' `key-chord.el'.
Elpa update