Fix several issues with Debian package
Fix several issues with Debian package

  * Add maintainer (also added to .rpm)
  * Fix directory permissions
  * Compress the man page

This reduces, but does not eliminate errors from lintian.

fhunleth/fwup,fhunleth/fwup,fhunleth/fwup,michaelkschmidt/fwup,michaelkschmidt/fwup,michaelkschmidt/fwup