Updated currency handling in stripe spur lib

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Updated mint currency handler

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Stubbed some payment gateways

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Allow html containers to evaluate lambda content

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Added dynamic name / description to mail transports

Signed-off-by: Tom Wright <tom@inflatablecookie.com>
Fixed html container lambda expansion

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