Add template for channel shift
Add guidance
Add line about KPI
Link to new guidance
Update guide type
Convert hypens to en-dashes and fix formatting
Change numbered list to subheadings

The list formatting was hard to follow. Sub headings break up the flow and are easier to read.
Edit heading and AD spelling
Merge branch 'channel-shift' of github.com:alphagov/government-service-design-manual into channel-shift

Conflicts:
	service-manual/communications/increasing-digital-takeup.md
Change eforms to online forms
Merge pull request #147 from alphagov/channel-shift

Channel shift