Prepare release 0.5
Add Base.__getitem__ which gets children from self.children
Prepare 0.5.1
A fresh new devlopment version which breaks compatibility with 0.5!
Added config.add_resource directive which uses a dot notation for representing resources tree:
  /users/             <=> users
  /users/{id}/photos/ <=> users.photos
Added an utility which introspect module where add_resource has been call and automatically construct resource tree.
Change example to reflect those changes
TO BE DONE:
1. tests, tests and tests
2. tests
3. documentation
4. doc!