feat(client): Pass along the `resume` parameter to the auth-server

Affects `signUp`, `recoveryEmailResendCode`, `passwordForgotSendCode`, `passwordForgotResendCode`

fixes #131
Merge pull request #132 from mozilla/issue-131-resume-parameter

feat(client): Pass along the `resume` parameter to the auth-server

@vladikoff gave the r+, merging!