sub: update fugitive

I'm constantly updating fugitive hoping it will work better on windows
than the previous version.
Fix minor spelling errors
Use noautocmd with bufdo

Prevent autocmds from running which will probably slow down execution.

Got it from justinmkw:
http://www.reddit.com/r/vim/comments/2306xg/can_i_use_unite_to_search_file_contents_of_open/cgs3tq3
Switch to pathogen#incubate

Change pathogen#runtime_append_all_bundles to
pathogen#incubate since the old one is just a
passthru.
Add map to facilitate inspecting leader maps
Add map for switching to previous window

ww is easy to hit and usually previous window is what I want.
Add exact word map for NotGrep

This is often what I want and it is easier to hit.
Add simple refactor map

Mapped to gr (I don't use virtual edit features, so I don't need gr).

Source: http://stackoverflow.com/a/597932/79125