Stubbed CHANGELOG for version 0.4.0
Bumped version to 0.4.0
Added set_domain_user_id method (closes #50)
Added set_ip_address method (closes #49)
Added set_useragent method (closes #48)
Added set_network_user_id method (closes #47)
Added tests for duid, tnuid, ip, and ua fields
Updated payload_data to 1-0-1 (closes #45)
Started using SSL for requests over HTTPS (closes #52)
Merge branch 'feature/0.4.0'