Bind C-x C-e to pp-eval-last-sexp in emacs lisp mode
Record time taken for each require
Use package-installed-p to detect dash-at-point
Add slime contrib dir to load-path at top level

This ensures that when a version of slime is installed which includes
the contrib subdir, then libraries in that dir are placed on the
load-path ahead of any dangling 2010* versions of slime-repl,
slime-fuzzy etc.

See #90
Use "sanityinc/" namespace instead of "smp/"
Don't require slime-{fuzzy,repl} if the installed slime package has "contrib"

See #90
Don't require slime for clojure
Merge remote-tracking branch 'purcell/master'