First implementation of sample references, only for C this far.

compiler/C_CodeGen.jrag

compiler/LabComm.ast

compiler/LabComm.java

compiler/LabCommParser.parser

compiler/LabCommmTokens.jrag

compiler/PrettyPrint.jrag

compiler/Signature.jrag

examples/twoway/decimating.c

examples/twoway/introspecting.c

lib/c/labcomm.c

lib/c/labcomm.h

lib/c/labcomm_decoder.c

lib/c/labcomm_dynamic_buffer_writer.c

lib/c/labcomm_encoder.c

lib/c/labcomm_fd_writer.c

lib/c/labcomm_private.h

lib/c/test/generated_encoding.lc

lib/c/test/test_labcomm.c

lib/c/test/test_labcomm_copy.c

lib/c/test/test_labcomm_generated_encoding.c