Added lines and columns to vimrc

Since I display an indicator when the cursor in VIM is at 80 characters, I'd like
for the window to be at least that wide to display it.

Also, set textwidth to 80 and autoindent. I may change this later if it becomes
too annoying.
Merge branch 'master' of https://github.com/james31415/vimrc

Conflicts:
	_vimrc