Do server setup in python only, remove shell script

  Can now define multiple notaries for the client,
  even though it will only really communicate with one
  allows tests for "wrong server"
Support multiple notary contracts

   No longer need to copy ~/.ot anywhere, just generate it in place

   Keep track of servers which we expect are active and available

   No longer sleep after starting notary (doesn't seem to help)
Add some new tests for nyms, split up tests
Merge pull request #30 from weissjeffm/multi-server

Multi server setup, new nym tests, split up tests
Add more tests for cheque recipients and unregistered nyms
Add test for voucher with unregistered nym
Add tests for invoices
Add more account and asset tests
Add more nym name tests
Check for correct return value on nym creation