Adjust His Master's Noise effects

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Change process_fx parameter order

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Implement His Master's Noise MegaArp effect

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update changelog

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update OS X dylib compat version number

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Change library link line to honor LDFLAGS

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>