added cleanup-on-shutdown; update to 0.2.0

[gewang]

propagating the changes for FaucK within chuck-max back...

for compatibility, I added this preprocessor check to Faust.cpp, which should compile with both chugin-10.1 and chugin-10.2 API version (the latter will clean up and addresses a potential crash-on-exit):

#if( CK_DLL_VERSION_MAJOR >= 10 && CK_DLL_VERSION_MINOR >= 2 )
    // register a callback to be called upon host shutdown (so we can clean up)
    QUERY->register_callback_on_shutdown(QUERY, cb_on_host_shutdown, NULL);
#endif

for now, did not change chugin.h (it's still 10.1). Everything should be bumped up to chugin API 10.2 by the next chuck release (1.5.2.5).

[gewang]

btw, this will address the weird mutex crash-on-exit issue; however, the fix won't take effect until we update chugin.h from 10.1 (current) to 10.2 (upcoming). But the code to take advantage of it in Faust.cpp is part of this PR.