Use better syntastic checkers.

Assume clang with C++11 for C++.
Use pylint instead of pyflakes.
GUI font fix.

I'm guessing this is a difference between Unity and other environments, but it
might also be a difference with newer versions of Ubuntu.
Move the status line crap into a separate file.
Add support for localconfig.vim.

After reading all of vimrc, localconfig.vim will be sourced if it exists. This
allows overriding the default configuration in case of differences between work
styles and personal styles, loading different environments, loading work
plugins, etc.
Add clang_complete plugin.
Use cpplint, clang_check, and clang_tidy.
Better behavior under tmux.
Set tw=72 for svn commits.
Better tab character.
Don't use cc or number for qf.