Updated the licence info and header for each file.

AUTHORS

_tags

doc/lustre_spec.org

src/Print.ml

src/Print.mli

src/access.ml

src/backends/C/c_backend.ml

src/backends/C/c_backend_common.ml

src/backends/C/c_backend_header.ml

src/backends/C/c_backend_main.ml

src/backends/C/c_backend_makefile.ml

src/backends/C/c_backend_spec.ml

src/backends/C/c_backend_src.ml

src/backends/Horn/horn_backend.ml

src/backends/Java/java_backend.ml

src/basic_library.ml

src/causality.ml

src/clock_calculus.ml

src/clock_predef.ml

src/clocks.ml