Major code reorganization.

examples/simple/example_decoder.c

examples/simple/example_encoder.c

examples/twoway/client.c

examples/twoway/decimating.c

examples/twoway/decimating.h

examples/twoway/introspecting.c

examples/twoway/introspecting.h

examples/twoway/server.c

lib/c/Makefile

lib/c/labcomm.c

lib/c/labcomm.h

lib/c/labcomm_decoder.c

lib/c/labcomm_default_error_handler.c

lib/c/labcomm_default_error_handler.h

lib/c/labcomm_default_memory.h

lib/c/labcomm_default_scheduler.c

lib/c/labcomm_default_scheduler.h

lib/c/labcomm_dynamic_buffer_writer.c

lib/c/labcomm_encoder.c

lib/c/labcomm_error.h