Pre-defined list of tags to use (only)

- Load in the list of tags from the DB, to use as an allowed list of tags, and also as
an auto complete list
- disable local storage, as this could cause inconsistencies with list for tagmanager
  and the list for typeahead
store tags URL in one place and reuse
remove auto save as it was causing new tags to be saved

- auto save wasn't working for the CKEditor anyway, so had
  limited value
- ensure that tags sent through on save are ones in the
  valid list
- ensure that random chars entered into keywords input
  weren't saved as new tags on publish
added strict equality
Merge pull request #55 from moneyadviceservice/restrict_tags

Restrict tags
removed hero image for now until we get
correct one through from admin

- adjusted min height of grey banner area when there
  is no image
removed selector which isn't needed (space between author image
and text below is enough with this selector)
removed image tag as it's not required yet
Merge pull request #57 from moneyadviceservice/banner

removed hero image for now until we get
initial work to get the header looking as per design
getting the fixed header working on mobile viewports
ensuring that the fixed header works across viewport widths
Update asset manifest file
Fixing url for facebook sharing
removing other attributes other than u=<URL>
based on feedback from Ben B
Merge pull request #58 from moneyadviceservice/fix_facebook_share

Fixing url for facebook sharing
Give contributor same access as publisher
Merge pull request #59 from moneyadviceservice/contributor-access

Give contributor same access as publisher
Seed tag list
Merge pull request #60 from moneyadviceservice/seed-tag-list

Seed tag list