Now when building a bundle file for source distribution of pgloader, always
test it by building a binary image from the bundle tarball in a test
directory. Also make it easy to target "latest" Quicklisp distribution with
the following spelling:
make BUNDLEDIST=latest bundle
When distributing a pgloader bundle we're using the ql-dist facility. In
recent commit we hand-picked the last known working distribution of
quicklisp for pgloader. Make it easy to target "latest" known distribution
or hard-code one from the Makefile or the bundle/ql.lisp file.
Using Quicklisp bundle facility it is possible to prepare a
self-contained archive of all the code needed to build pgloader.
Doing that should allow users to easily build pgloader when they are
being a restrictive proxy, and packagers to work from a source tarball
that has a very limited build dependencies.
