for backwards compatibility (i.e. to keep pull-lp-source,
pull-debian-source, and pull-uca-source) and for ease of use,
create scripts that default the pull-pkg -p and -D params
re-create pull-pkg script also, to call ubuntutools/pullpkg.py
without any default pull or distro parameters
rename only with no content changes, so next commit shows code
changes converting script pull-pkg to module pullpkg.py
This also changes the file mode from 755 to 644, since we're changing
an executable script into a module.
New pull-pkg allows pulling source, debs, ddebs, or udebs, or just
listing all package files. Also, package lookup by binary name is done
automatically.
