Fix a bug in the dataset form

Merge branch 'feature-1720-tag-taxonomies'

[doc] add info about create-example-vocabs paster command to readme

[commands] add 'not yet implemented' warning for clean command

[forms] add vocab tags back to dataset view page

[forms, commands, templates] Add extended example vocabs and tags to paster command and reintegrate with form

[merge] temporarily revert extended example

[forms, commands] move code for creating example vocab to a paster command

Extend the vocabularies example

Add two example vocabularies: Genre and Composer

Show a dataset's vocabulary tags in the sidebar on the dataset read page

Vocabulary tags cannot be linked to the tag's page, because their aren't
URLs for showing tags with vocabularies yet.

'vocabulary_name' -> 'vocabulary_id'

Name of argument was changed in ckan core

[1730][plugin, templates, scripts, css] add chosen plugin for vocab tags multiple select

[1730][forms, templates] use a html select for
vocab tags instead of standard (free) input field

[1730][forms] add vocab tags to template variables

[1720][forms, templates] Don't show tags with vocabularies
in standard 'tags' listing

[1720][forms] update for change in location of
Vocabulary get function

[1720][forms] tidy up: remove unused imports

[1720][forms] Update for change in location of vocabulary get function

[forms] add example vocab if doesn't exist
display tags with example vocab

[forms] set dataset form as default (fallback)
update form_to_db schema for tags with vocab

[templates] add latest version of dataset form.
Add custom extra (published_by) and field for tags
with custom vocab

[setup] tidy up

Modified template to include the original content from the content div

Renaming registered types names

Clarified the commenting and changed the layout template to show adding groups

Adding ID tags to the new dataset template so that the anchor URLs work properly

Making sure we can determine whether the group_form() func was called

Implementation of an IGroupForm

Forgot to rename the path to the example form

Tidying up the naming of some files

Cleaned up the controller plugin and started removing some cruft.

Make sure the new plugin implemented IConfigurable in case it was used in
isolation (we need to make sure the template folder was in config)

Removed the accidental dependency on dgu

Cleaning up the code and renaming some classes to better reflect what it is

Added a sample IDatasetForm to show how we can implement a custom form from a plugin.

Currently the form is pretty ugly and the controller_plugin needs simplifying so that it makes a more sensible example. The setup.py has had the plugins section changed and the version upgraded to 0.2 ready for when it is complete

[docs] Partially revert the last doc change.

I mis-read the part about the custom package form as being about the
custom user-registration form.

[docs] Updated documentation to reflect change to the User form

[register form] Updated the register form.

Updated to use the standard controller hooks that alter the behaviour of the form. In this
case, a fullname is required at registration. And that is maintained on the edit form too.

Updated for ckan 1.5. (Form still needs updating, but this is noted in README.)

[readme][xs]: more formatting.

[readme][xs]: formatting.

[gitignore][xs]: .

[refactor][m]: rename extension from exampletheme to example as per new repository name.

[form]: Get form working with CKAN 1.4.1 (formalchemy deprecated).

add comment about naming routes

move plugin out of __init__.py

shell script to name extension to something else

correct xpath filter transform