Keteparaha

Changed
- Better error message when we cannot find a component in a page

Changed
- Only refresh elements that are actually stale when getting text

Changed
- Bugfix, components returned by get_components are assigned unique selectors
using nth-child. This is going to fail if the original selector is not
specific enough.

Changed
- Adds a hover method so that we can trigger dropdowns and the like
- Add a clear method that takes a selector
- Components refresh their element before returning their text
- Adds a has_text method to all pages and components. Remove the assertions
from the page/component class. These should live in the test case

Changed
- Subclasses of component can be passed as the value of the open argument to
a page or components click method.

Changed
- Breaking change of the of api to use new automatic page and component
discovery
- CNAME file so that the project can be found at keteparaha.aychedee.com
- Action methods of Page and Component automatically return the appropriate
page or component. Pages and Components are registered using a metaclass
mechanism similar to Django's ORM.