executive elephant

This release contains a significant number of API changes across the following packages.

push

• NewService API replaces NewClient. #47
  • Topic has moved from Headers to Service and is extracted automatically by NewService (see #22)
• revise error responses to include HTTP Status code and Reason from Apple #46
• decode response JSON as a stream #43

certificate

• Load/Decode now return a tls.Certificate instead of a x509.Certificate and PrivateKey. This matches the behaviour of tls.LoadX509KeyPair from the standard library, except operating on *.p12 files instead of *.pem. #47

pushpackage

• Sign now accepts a tls.Certificate instead of a x509.Certificate and rsa.PrivateKey, though note that the key must still be an RSA key. #47