added CACHE_MAC_LLIP = False option to avoid storing MACs and LLIPs llonger than needed
Merge branch 'master' of github.com:HenriWahl/dhcpy6d
added collection of timestamps of collected MACs to be able to delete them soon
Debian changelog modified
fixed Linux ip binary
added LOG_MAC_ADDRESSES option whicht defaults to 'disabled'
not yet complete to internal neighbor cache storage oa objects
Debian package: Fix error "badly formatted trailer line"

Also set distribution to UNRELEASED.