Changed memory handling to a pluggable architecture.

compiler/C_CodeGen.jrag

examples/simple/example_decoder.c

examples/simple/example_encoder.c

examples/twoway/Makefile

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_default_memory.c

lib/c/labcomm_dynamic_buffer_writer.c

lib/c/labcomm_dynamic_buffer_writer.h

lib/c/labcomm_fd_reader.c

lib/c/labcomm_fd_reader.h

lib/c/labcomm_fd_writer.c

lib/c/labcomm_fd_writer.h