No need to autoload the connection hook modification.

In fact, it seems inappropriate to do this automatically.
nrepl-eval-async => nrepl-send-string
nrepl-current-ns => cider-current-ns

Fixes #42
Fix references to cider-interaction-mode, which is now simply cider-mode

Closes #43
Add syntax highlighting to README
Clarify readme line, since init files can't set cider-mode-map before cider is loaded.
Merge pull request #45 from deg/doc-tweak-31Oct13

Clarify readme line
Clarify example set-up code in commentary (see #45)