Add some error checking for SRP account functions
Split initial SRP exchange for easier testing.
Modify server tests for server-side account
Fix some obvious bugs in server account object
Fix hashing for verification message
Pad M1 to full SHA-256 length
SRP M1 was wrong in server test due to wrong padding
Modify postgres tests for SRP
Update postgres sample transaction for SRP
Update API docs for SRP
Squash a couple remaining padding bugs