Add jump-to links to fields in concept form

Fix #463

Signed-off-by: Byron Ruth <b@devel.io>
Port models.concept to JavaScript, rename exported classes

All models and collections are already namespaced under `cilantro.models`,
so having the `Model` or `Collection` suffix is redundant.

Signed-off-by: Byron Ruth <b@devel.io>
Show "jump to" links only if concept contains more than one field

Signed-off-by: Byron Ruth <b@devel.io>