clarify wording when early registration discount applies
add clarity to payment confirmation emails too
Merge pull request #326 from CruGlobal/email-discount-text

Email discount text
allow editing of some information for payments by admin
 - Comment
 - Transfer/Scholarship source
 - Amount (for scholarships and transfers only)
Merge pull request #328 from CruGlobal/Payment_updates_for_Daniel

Payment updates for daniel