Updated debian build process

[dgersting]

Issue #251

Obsoletes PR #211

• Produces an architecture-dependent Debian package (Fixes #251)
• Moves .deb build to the Makefile alongside existing .rpm build
• Debian package is now complaint with Debian Policy

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[anthotse]

Hey @dgersting, thank you for your contribution. We've merged in PR #211 to resolve this issue.