Changed markdown wrap length and leader timeout.

Added local setting for markdown file types to increase line length to 100
characters. 79 was to short, particularly with embedded URLs.

Tweaked leader timeout value. Mappings now get 1 second and key codes 1/2
a second before timing out.
Merge branch 'master' of github.com:zanshin/dotfiles

* 'master' of github.com:zanshin/dotfiles:
  cleaned up spacing in tmux status bar