setup.py: downcase WAL-E to wal-e

Continue the general conversion of machine-intended references to
WAL-E to be lower case, much like the executable, package name,
repository, and so on.

It is still handy to have capitalized name (and WAL is an acronym
anyway) because it makes references to WAL-E stand out in human-read
text without quoting or special formatting.

Signed-off-by: Daniel Farina <daniel@heroku.com>
setup.py: prepare metadata for cheeseshop upload

Also refactor the way short files are read into cheeseshop metadata.

Signed-off-by: Daniel Farina <daniel@heroku.com>
Add build and packaging tools for PyPI

Editorialized (mostly, just squashed) by Daniel Farina.

Signed-off-by: Daniel Farina <daniel@heroku.com>
Add contributor: Kirill Klenov

Signed-off-by: Daniel Farina <daniel@heroku.com>
Fix license placeholder expansion

Signed-off-by: Daniel Farina <daniel@heroku.com>
Stamp v0.6.2

Signed-off-by: Daniel Farina <daniel@fdr.io>