[#1946] Upgrade Sphinx to 1.2.3
Upgrade sphinx-rtd-theme to 0.1.6.
[#1946] Fix a couple of Sphinx errors
[#1968] Fix IGroupForm docstrings
[#1978] Don't include datasets on get_organization helpers

They are not really needed and decrease significantly the performance
Merge pull request #1978 from ckan/1978-dont-include-datasets

Don't get all datasets when loading the org in the dataset page
Update CHANGELOG after 2.0.5, 2.1.3 and 2.2.1 release
Merge branch '1946-fix-sphinx-html-build'
Update docs for package and source install

Both source install and package install allows solr and postgres to be run on
separate servers.
Fix formatting
Add a note for configuring postgresql
Update Apache and Nginx config to be more modern
[#1984] exclude trailing ,.; in external link
[#1987] group_list returns groups of passed type.

group_list get action will return group types specified by passing
the optional parameter type=<group type>. The default is 'group'.
[#1987] PEP8ing before changes
[#1987] IGroupForm plugins can define controller.

If you're using a custom controller with an IGroupForm plugin you can
define it in the plugin with 'group_controller()'. This will be used
when registering the plugin mappings. Defaults to 'group' if not defined
in the plugin.
[#655] Add extra metadata fields by default
Merge pull request #1987 from brew/1987-custom-group-changes

Changes to allow better use of custom group types in IGroupForm extensions
[#1984] Add test and improve readability.
Merge pull request #1990 from ckan/1985-autolink-punctuation

1985 autolink punctuation