Implemented tangled link extension. This can be extended for other link types like issue/pull references in future.
The tangled.org host is hardcoded right now.
Close: https://tangled.org/tangled.org/core/issues/382
Signed-off-by: Seongmin Lee git@boltless.me
@oppi.li makes sense. I completely forgot the indigo oauth behavior. I reverted the change.