Added notification view type

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Added recipient check to flow notifications

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Added basicLink html helper

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Added templated notifications

Signed-off-by: Tom Wright <tom@inflatablecookie.com>