Support IPv6 for UDP sockets, fixes #45.
Bump version.
Fix the documentation and yield functionality in passthrough!.
Bump version.
Add Ruby 2.2 to Travis.  Reorder Rubies.
Merge pull request #48 from ValiMail/feature/add_2_2_to_travis

Add Ruby 2.2 to Travis.  Reorder Rubies.
added transaction spec testing for record types AAAA,MX,NS,PTR,SOA
Merge pull request #50 from cmc476/transaction_record_checks

added transaction spec testing for record types AAAA,MX,NS,PTR,SOA
Updated transaction record specs, all passing.