Made auto tag linking more 'aggressive'.

Now uses a regex to get more matches.

Also will link inside articles that have other links.

Still only links in paragraphs that have no other links.
Merge branch 'master' of github.com:guardian/frontend into tag-linking
Remove unused formatTags fragment
Cleaning up split line
Trying to make regex more readable is a fools errand
Added temporary football embed for worldcup groups
Move embed routes about
Lowercase please
Merge branch 'master' of github.com:guardian/frontend into football-groups-embed

Conflicts:
	common/app/conf/switches.scala
Admitting football embed is for R2
iframe overflow
add HeadlineSans font
correct fonts
this is now in guss-typography
latest guss
add font on advertisement feature articles
grey bg on advertisement feature fronts
add HeadlineSans to webfont.css
only load headline sans font on advertisement features
Add new preview domain to cors whitelist