Adds mapping for opening a new line "Lisp-style."

Sometimes with Python, Java, etc. I'll have a function call with too
many arguments and want to wrap it. That wrapping should be
"Lisp-style," with the start-of-line matching the left-paren.
Adds mappings for opening a bulleted line above.

When taking notes, I use <Leader>ob to open a line starting with a
hyphen below the current line. This change adds a few options for
opening upward: <Leader>OB, Ob, and oB.
Removed redundant things under the 80-char limit section.
Adds mappings for 72-char limit.

<Leader>8 and <Leader>* toggle an 80-char limit. Now <Leader>7 and
<Leader>& toggle an analogous 72-char limit, for git commit messages.
Changes 80-char limit to 78.

Mappings for 80-char limit, <Leader>8 and <Leader>* now actually use a
78-char limit.
Installed pathogen and surround.vim as a git submodule.