replaced elnode with emacs-web-server

  This works around some issues I was having with elnode.  Namely, it
  seemed slow, overly complicated, unreliable and generated huge amounts
  of information-less logs.

  Emacs web server [1] is simpler and does seem to be faster in my
  experience so far.

  [1]  https://github.com/eschulte/emacs-web-server
updated for changes to ews
use new ews in-directory checking function
rename Emacs Web Server prefix ews -> ws
emacs-web-server to web-server
fix compilation errors
add commentary
switching from marmalade to melpa
README tweak
melpa want's this in the base of the repository
don't actually need this dependency w/Emacs 24.3
updated version
removed old elnode auth support
re-organizing notes
merge README and NOTES
update README
Support custom agenda commands

Support custom agenda commands, whose URL will be /agenda/custom/KEY,
where KEY is one of the prefixes for a command in
org-agenda-custom-commands.
Change the content type for 400 responses so that HTML may be sent in
the body (to support links within error messages).
Merge pull request #7 from jeffkowalski/master

Support custom agenda commands