Update binary format

[ghispi]

ApnsPHP uses legacy Enhanced Notification Format, please update to the The Binary Interface and Notification Format.

Or actually separate Message from converter and create them separately for all formats:

• The Binary Interface and Notification Format
• Enhanced Notification Format
• Simple Notification Format

[ivanbaldo]

The advantage of the new format is that it supports Priority.

[edwardmp]

Has this changed or does ApnsPHP still use legacy format?

[timotiusericks]

So can anyone use priority with ApnsPHP ? if does, please give me example, thanks