Updated to work with Evernote OAuth

Used patches from
https://github.com/kechako/emacs-evernote-mode-developer-token and the
latest enclient.rb patches from the Google Code bug at
http://code.google.com/p/emacs-evernote-mode/issues/detail?id=14

This seems to be working for me so far.  Still testing.  I'm new to
Evernote.