send welcome email as soon as possible after freebie invoicing
call send_welcome_email w flag denoting log user back in
Merge pull request #38 from wluo/flock

make sure we pass all the arguments to the go_subscriptions_signup_form callback
add login_with_key capability to trialists with subscription; set the activation key manually; call create_guest_user with do not login flag
use a go-slog call rather than aborting the subscribe_free_period entirely, if sync fails
code review: add comment
Merge pull request #37 from okredo/issues-4541-no-welcome-email

send welcome email as soon as possible after freebie invoicing
Merge pull request #39 from GigaOM/master

Merge branch 'master' of github.com:GigaOM/go-recurly into flock
apply the 'go_recurly_plan_code' filter on the default plan code to allow another plugin to override it