Editionalise the commercial tags
Added IMR and AMAA tags
evert "Switches now have an sell-by-date"

This reverts commit eddb2722ebfd58ed33b47ef735c8f26260b0b1b8.

Conflicts:
	common/app/conf/switches.scala
Correct the switch descriptions
Merge branch 'master' of https://github.com/guardian/frontend into editionalised-tags

Conflicts:
	common/app/conf/switches.scala
	common/app/views/fragments/analytics.scala.html
	common/test/conf/SwitchesTest.scala
Merge pull request #2722 from guardian/editionalised-tags

Editionalised commercial tags