It is stable now

This is a stable release of phptrace, feel free to use it in production environment.

Changelog:

feature

• Support Mac OS X (just the trace feature)
• Support PID which is bigger than 32768
• Support PHP 5.6+
• More human friendly error message
• Remove the temporary tracelog once open

bugfix

• Probably cause segfault on PHP5.5 +
• Probably cause segfault when fetch the return value of PHP extension functions
• Replace usleep with sleep to be compatible with more os platforms
• Fix phptrace script syntax error
• Fix fd leak when stop trace in the extension