Use modern notification format.
Use tls conn rather than net.Conn, and add sanity check on response. Change deviceToken to hexadecimal.
Use correct feedback URL / port in documentation
update comments and tests.
Update mock feedback server to use a TLS connection rather than raw TCP.
Merge pull request #8 from draaglom/fix_feedback

Fix feedback
Merge pull request #7 from enulex/master

Use modern notification format.
Merge remote-tracking branch 'upstream/master'