Remove unused checked assign

* Checked variable isn’t being used anywhere
Lock & hide display date fields if confirmed date

* When the date is confirmed, the display must be exact — users were
confused when they selected a date, the radio option changed but they
were still able to switch it back to one or two month precision
* Instead, switch to exact, lock the form field and hide the one and
two month options
Move release date fields into partial

* Stop repeating fields in new announcement and new date change forms
Upgrade Bootstrap from 2.0.3 to 2.3.2

* Delete old Bootstrap js and css assets
* Use Bootstrap SASS gem to load assets and to give access to SASS
variables and mixins
* Bootstrap changelog: https://github.com/twbs/bootstrap/releases
Switch back to smaller font size and line height

* Doesn’t address oversized headers
Simplify govspeak help styles

* Remove font-size declaration, was compiling to invalid CSS
* The background is already white
* The width doesn’t need to be constrained
* The pre styles aren’t being used, and it’s grey by default
* Remove the link cursor styles and add an href to the links themselves
(Bootstrap 2.3.2 defaults a target to the value of a link’s href)
Reduce govspeak header sizes

* Bootstrap 2.3.2 has larger headings, scale them back for govspeak so
the aesthetics stay the same
Use list inline styles provided by Bootstrap 2.3.2

* 2.0.3 missed the `inline` feature so it was patched in, this patch
can be removed now
Update `form-large` styles to match new buttons

* Large buttons are a bit bigger, this more specific version needs to
match that
Update Whitehall style guide advice

* Link to guidance about 2.3.2, especially the fluid grid
Update organisation relationship text for exec agencies and NDPBs

Exec agencies and NDPB were being described as being 'of' their parent
organisation, eg. "X is a non-departmental public body of Y". Instead,
we should be saying that "X is a blah, sponsored by Y"
Orgs superseded by devolved administrations described as a 'body of Y'
Don't disable date precision fields

* Disabling fields means their values aren’t passed through
* Presenting a radio button without a choice is confusing, also hide
the radio button when a date is confirmed
Merge pull request #1671 from alphagov/modify-org-relationship-text

Modify organisationship relationship text
Remove margin from h3s in admin document lists

* Bootstrap 2.3.2 adds a default margin to h3s
* In this case it’s undesirable, styles now match 2.0.3
Merge pull request #1663 from alphagov/display-date-refinements

Hide display date fields when date is confirmed
Merge pull request #1669 from alphagov/bootstrap-upgrade

Upgrade Bootstrap to 2.3.2