Change safe_eval to a strict white list
Updated DEB build workflow

Updates to Makefile include:
 * add targets: deb-src, deb-src-upload, deb-upload
 * add variables to control DEB building: DEBUILD_OPTS, DPUT_OPTS, DEB_PPA, DEB_DIST, DEB_RELEASE
 * create deb files for all release values in DEB_DIST

Several updates to packaging/debian/*
 * Updated control file
 * Whitespace/formatting of changelog

Add deb-build to .gitignore
Correct Makefile variable usage
Add support for rpm builds through mock
Assert the MOCK_CFG exists for the mock-rpm build target
Version bump for 1.6.4
Additional fixes for safe_eval
Version bump for 1.6.5
Merge tag 'v1.6.4' into 1.6.x

New release, 1.6.4
Merge tag 'v1.6.5' into 1.6.x

New release, 1.6.5