Improve/make targets - Githubissues

Improve the Makefile.

install and install-nodocs install mlyacc-polyml (and a document)
mlyacc-polyml and mlyacc-polyml-nodocs build the mlyacc-polyml (and a document)
test compare the result of mlyacc-polyml and expectations
example run the mlyacc-polyml with sample inputs

eldesh / mlyacc-polyml