el/dot-emacs.el: Basic configuration (and fixes) for Magit's repo list.

el/dot-emacs.el: Basic configuration (and fixes) for Magit's repo list.

By default it should look in `~/src/' for repositories -- duh.  A
`~/.emacs-local' can override the list as appropriate.

Unfortunately, Magit's repo list is rather buggy.

  * The function `magit-rep-list' returns filenames rather than
    directory names, and Emacs (24, at least) then sets the wrong
    current directory when running inferior processes to find out about
    the repos.

  * The functions `magit-repolist-column-un{pulled-from,pushed-to}-
    {upstream,pushremote}' are just screwed because they expect `magit-
    get-{push,upstream}-branch' to magically turn `nil' into the current
    branch name, which isn't going to happen.

So, configure things, and hack around the bugs.