8023 webtest

[will-moore]

Webtest cleanup and improved docs. See /webtest/ for notes on all the currently supported pages.

This branch is based on Ola's 7993_transition branch.

[chris-allan]

@will-moore: Import errors from webtest/views.py:

File "/Users/callan/code/ome.git/dist/lib/python/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/callan/code/ome.git/components/tools/OmeroWeb/omeroweb/../omeroweb/decorators.py" in wrapped
  241.                 return ctx.on_not_logged_in(request, url, error)
File "/Users/callan/code/ome.git/components/tools/OmeroWeb/omeroweb/../omeroweb/decorators.py" in on_not_logged_in
  85.         logger.debug('Request is not Ajax, redirecting to %s' % self.login_url)
File "/Users/callan/code/ome.git/components/tools/OmeroWeb/omeroweb/../omeroweb/decorators.py" in get_login_url
  59.         return reverse('weblogin')
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in reverse
  391.             *args, **kwargs)))
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in reverse
  312.         possibilities = self.reverse_dict.getlist(lookup_view)
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _get_reverse_dict
  229.             self._populate()
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _populate
  208.                     for name in pattern.reverse_dict:
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _get_reverse_dict
  229.             self._populate()
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _populate
  197.         for pattern in reversed(self.url_patterns):
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _get_url_patterns
  279.         patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/callan/code/ome.git/dist/lib/python/django/core/urlresolvers.py" in _get_urlconf_module
  274.             self._urlconf_module = import_module(self.urlconf_name)
File "/Users/callan/code/ome.git/dist/lib/python/django/utils/importlib.py" in import_module
  35.     __import__(name)
File "/Users/callan/code/ome.git/components/tools/OmeroWeb/omeroweb/../omeroweb/webtest/urls.py" in <module>
  4. from omeroweb.webtest import views
File "/Users/callan/code/ome.git/components/tools/OmeroWeb/omeroweb/../omeroweb/webtest/views.py" in <module>
  9. from webtest_utils import getSpimData