Adding initial version of the OAuth token authentication method. This adds basic OAuth support for registering apps, getting and revoking keys, etc... The tokens come with 6 separate permissions bits; read/write user preferences, write diaries, write API and read/write GPS traces. Needs more tests.

app/views/oauth_clients/new.html.erb

@@ -0,0 +1,5 @@
+<h1>Register a new application</h1>
+<% form_for :client_application, :url => { :action => :create } do |f| %>
+   <%= render :partial => "form", :locals => { :f => f } %>
+   <%= submit_tag "Register" %>
+<% end %>