fixed a visual bug when a collection contains no items.
raise should be throw
basic setup for a belongs_to form field
rewired the routing/view rendering code using Promises (first time use...)
removed extra in-between div for top views (form and index). Removed big change events.
currently we don't need to listen to collection reset event anymore on Machine.Views.Index
added modal that renders index
(hopefully) fixed a bug related to the modal backdrop not disappearing
modal id_selector now wont show links or an add button
fixed a bug in showing forms
refactored index-related views to take into account different modes more explicitly (might be revised in the future, see Github issue #6)