also add new command findings:
* undocumented command GSB
* syntax and other errors fixed
* explode a bit of xml in places that were a bit too long
* find out what a "merchant cab" file is (one line of xml)
fix all XML example responses missing charset
Change "Contact ID" with "Common ID", for now. Really would like to know which one is canonical.
Added 3 reference constants.
Linked things and fixed minor mistakes.
Next is probably Passport SOAP, not sure.