todos migration
renames todo model to task to fix namespacing conflict with rails app name
api controller for tasks and route setting
Merge branch 'feature/add_todos_model' into develop

* feature/add_todos_model:
  api controller for tasks and route setting
  renames todo model to task to fix namespacing conflict with rails app name
  todos migration
added root controller and root view
basic task listing and form with backbone.js
finished ajaxy form