automatically from the first available partition.
There is no need to fiddle with sizes while keeping the offsets in mind any longer.
Introduced Bytes() class which makes it a lot easier to handle size units.
New phase introduced "package installation" (fixes#114)
Apt source lines are now parsed, this allows to verify the target release of added packages.
All packages (except locales) are now installed *after* bootstrapping (fixes#123)
Added env argument to log_(check_)call
HostDependencies have been refactored a little
