Added function to "leave" a NAMESES session.

This saves the current session, and disengages emacs from it. All
future changes aren't saved when closing emacs, but the existing buffers
aren't closed.
Remove extra ')' with hippie-expansion

When using hippie-expand-{line,list} in a buffer with paredit enabled,
the finishing ')' character is added, despite paredit having already
inserted it.

Added an advice around the hippie-expand function to remove this extra
character, found from http://www.emacswiki.org/emacs/HippieExpand
Don't use ido for nameses -- means helm takes over
Ignore SLIME-REPL-MODE with SMART-TAB