[#262] Fix helper import in controller home
[#262] Fix helper import in controller package
[#262] Fix helper import in controller tag
[#262] Fix helper import in controller group
[#262] Fix helper import in controller feed
[#262] Fix helper import in controller revision
[#262] Fix helper import in lib.base
[#262] Fix helper import in lib.field_types
[#262] Fix helper import in lib.mailer
[#262] Fix helper import in lib.jsonp
[#262] Fix helper import in lib.search.query
[#262] Fix helper import in logic.validators
[#262] Fix helper import in version 022
[#262] Fix helper import in version 029
[#262] Fix helper import in tests
[#262] Move externals from lib helpers to ckan.common
[#262] Convert tests that used from lib.helpers import ...
[#262] Fix import of lib helpers in lib.repoze_patch
[#255] First part of API docs update for CKAN 2.0

The action API is now the default API.

Moved apiv3.rst -> api.rst.

Edited and rearranged apiv3.rst.

Removed the API quickstart tutorial as superfluous.

Removed the Tools for Accessing the API section as these tools
(particularly ckanclient) are out of date and unmaintained.

Moved what was in api.rst and api-v2.rst into legacy-api.rst.

Moved the Search API docs (which were mixed into apiv3.rst with the
Action API docs) into api-search.rst. The old version of the search API
is still documented in legacy-api.rst.
Merge branch 'master' of github.com:okfn/ckan into 255-update-api-docs