ApiError: Add individual error codes for further testing
Tests: use asserts
Merge pull request #4 from jnv/master

Store code for API errors in exception, use asserts in tests
updated version
Create/update contact
Merge branch 'master' of https://github.com/cikorka/python-subreg
Implementation of make_order, create_domain, transfer_domain, modify_domain, modify_ns_domain, delete_domain, restore_domain, renew_domain