fixed debian versioning scheme

it should be less than official debian package (which is not exists yet)
but greated than ubuntu packages. also debian7 packages must be > debian6 packages (debian6 does not exists yet too)
debian/ubuntu scripts - make sure we're running /usr/bin/perl + rebuild
debian squeeze added
Debin 8 (jessie, testing) added
README - debian 6,8 added to deploy instructions
Debian 6 install instructions - cosmetic
Debian 6 install instructions - more cosmetic
install instructions - cosmetic