bl00mbox: more plugins&plumbing, shoegaze application

components/bl00mbox/CMakeLists.txt

components/bl00mbox/bl00mbox_plugin_registry.c

components/bl00mbox/bl00mbox_radspa_requirements.c

components/bl00mbox/bl00mbox_user.c

components/bl00mbox/include/bl00mbox_user.h

components/bl00mbox/plugins/brok3n/filter.h

components/bl00mbox/plugins/delay.c

components/bl00mbox/plugins/delay.h

components/bl00mbox/plugins/distortion.c

components/bl00mbox/plugins/distortion.h

components/bl00mbox/plugins/flanger.c

components/bl00mbox/plugins/lowpass.c

components/bl00mbox/plugins/lowpass.h

components/bl00mbox/plugins/mixer.c

components/bl00mbox/plugins/mixer.h

components/bl00mbox/plugins/noise.c

components/bl00mbox/plugins/osc_fm.c

components/bl00mbox/plugins/slew_rate_limiter.c

components/bl00mbox/plugins/slew_rate_limiter.h

components/bl00mbox/radspa/radspa.h