Version 0.1.8:
   + added handling of IMPLICIT/EXPLICIT tagging.

Version 0.1.7:
   + use SableCC (2.16.2) instead of JavaCC.
   + better primitives for setting values to ASN.1 objects.
   + added support for GeneralizedTime.
   + added support for all printable string types.
   + use (cygwin) make and bash.
   + use log4j for logging.
   + use Aaron Renn's getopt package for command line processing.
   