Tmux improvement on osx

Faster escape time to fix vim issues and new <C-a>a shortctu for sync
Panes! Increased pane resizing step to 15.
Improved maps and new plugs.

New markdown plugin and remap fugitive maps to space instead of leader.
Fugtive diff map added.
Removed useless space
Removed useless paths
Added osx4hackers.
saner osx defaults
removed sublime shit