Some fixes to the debian folder

This address issue https://github.com/ZoneMinder/ZoneMinder/issues/625 but also remove some lintian errors and warnings:
- build-depends-on-obsolete-package build-depends: dpatch
- dir-or-file-in-tmp tmp/zm/
- perl-module-in-core-directory
- FSSTND-dir-in-usr
- dir-or-file-in-var-run var/run/zm
- package-needs-versioned-debhelper-build-depends 9
- dpatch-build-dep-but-no-patch-list
- patch-system-but-no-source-readme
- out-of-date-standards-version 3.9.2 (current is 3.9.4)
- description-synopsis-starts-with-article
- perl-module-in-core-directory
- wrong-section-according-to-package-name
- debug-package-should-be-priority-extra