Change default c compiler from tcc to gcc.
makefile and sanity-check now assume default c compiler (gcc).
Use 'make -f tcc-makefile ...' and tcc-sanity-check to build and test using tcc.
Add make target 'spitbol-dynamic' to build spitbol with dynamic linking.
Merge branch 'master' of http://github.com/hardbol/spitbol

Conflicts:
	makefile