Changed Backbone.couch_connector.update to use $.couch.db.updateDoc

[gijohnson-usgs]

Referencing Issue #42, this change allows the use of CouchDB's update handlers.

Usage:

con.update(model, {
  updateFun : "update_handler",
  attr1 : attr1,
  attr2 : attr2,
  ...
  success : function(doc) {
    ...
  },
  error : function(doc) {
    ...
  }
})

I'm also interested in having Backbone.couch_connector.create call this function if the user provides an "updateFun" option.

[janmonschke]

Looks good to me, but can you merge in latest master first and then run the tests? (https://github.com/janmonschke/backbone-couchdb/blob/master/test/readme.md)

[gijohnson-usgs]

Tests are passing, but I'd like to add some more.

[gijohnson-usgs]

I've add more tests and moved the updateFun from opts to the model. I think this is more intuitive, but if you have other suggestions I'd love to hear them.

[gijohnson-usgs]

Another option is to add updateDoc if it doesn't exist.

[janmonschke]

That's another option, we could do that.
But then we'd also have to maintain that function.

Let's try with including the function.

[gijohnson-usgs]

Would you like it added to $.couch.db or perhaps in Backbone.couch_connector.helpers?

[gijohnson-usgs]

I decided not to include it b/c $.couch is using a few nested closures and updateDoc relies on one 'private' method called encodeOptions.

[gijohnson-usgs]

Changed my mind. Now there is a check in update that binds update_doc and it's dependency encode_options to the db object if $.couch doesn't contain it. All tests are passing.