Added btp_core_frame_calls_func function for crash thread indetification.
Added btp_core_thread_find_exit_frame function for crash thread identification.
Added btp_core_stacktrace_find_crash_thread for crash function identification and btp_core_stacktrace_from_json_text for easier parsing of core stacktraces
Merge branch 'master' of github.com:karelklic/satyr