Added test to show that the sites framework cache doesn't play well
first version of oracle support

it does not pass tests and don't support schema/user creation
Changed comment. Oracle support untested. Thanks for contribution, Sławomir.
Added top warning to README.
Text fix.
Merge branch 'master' of https://github.com/tuttle/django-schemata

* 'master' of https://github.com/tuttle/django-schemata:
  Text fix.
  Added top warning to README.
  Changed comment. Oracle support untested. Thanks for contribution, Sławomir.
  first version of oracle support
  Added test to show that the sites framework cache doesn't play well