v0.6.0 (Mouse)

• implement converting HawkTracer stream to callgrind format
• fix install problem with pkg-config files
• fix ht_thread_get_current_thread_id() function
• add information about system endianness and HawkTracer version to metadata stream
• fix deadlock in TCP listener
• add memory usage tracking feature for Linux-based platforms
• add python bindings to a parser library
• documentation improvements (tutorials, examples, missing function documentation)
• publish documentation online (https://amzn.github.io/hawktracer/)
• many other tiny bug fixes and minor improvements