PLM Terminal Windows Support

Modified PLMTerminal.pl to support readkey differenced between linux and ActiveState perl.  Has been tested with Linux Debian Woody (perl 5.10) and Windows ActiveState perl (perl 5.12). Please report any issues with other perl versions, linux distributions, or PLM types.
Merge branch 'master' into insteon_decoder
Merge pull request #34 from mstovenour/insteon_decoder

PLM Terminal Windows Support