Created Build.PL script -- the modern way of making Perl modules.

Replaced the Makefile.PL with Build.PL, which creates a Makefile
automatically (if enabled).

Added config to Build.PL to share "tests", so the tests can run.

The html target is now available with Build.PL

Moved PrintCols.pm into lib/Array/PrintCols.pm -- which is where
Build.PL expects it to live.

Regenerated the MANIFEST file, after properly setting certain
non-targets in MANIFEST.SKIP, such as Makefile, and other built
files.

Recreated the main 2.4 distribution tarball.
Merge branch 'master' of github.com:aks/array-printcols