rename the pungi binary to pungi-koji since it does is tasks in koji
rename pungi-gather to pungi as it is the standalone old pungi binary
there is scripts that expect pungi to be the old pungi, the new binary
is not yet in use, pungi-koji semes to make sense, open to better ideas
The default is /usr/share/pungi/multilib/, pass --multilibconf to
override this.
This also adds multilib.init() so that an import of multilib doesn't
immediately setup the classes.
(cherry picked from commit 234524296fd53871aed64690cf6a7d5849ca154a)
for https://fedorahosted.org/rel-eng/ticket/6008 refacter how we deal
with the data that feeds into .treeinfo
Deprecate --name for --family
Deprecate --flavor for --variant
rather than using --name as the iso base name use the value of
family if there is a variant add it with a - as the seperator
