Comment 4 for bug 1591763

Reviewed: https://review.openstack.org/420273
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=cdfb121cf4eef96b917b0e3d7e86616b965e3506
Submitter: Jenkins
Branch: master

commit cdfb121cf4eef96b917b0e3d7e86616b965e3506
Author: Eric K <email address hidden>
Date: Fri Jan 13 19:10:28 2017 -0800

    Remove antlr3 files except Python runtime

    The removed files are not needed by users, and some files
    are incompatible with free software packaging (e.g. jar)

    Drawback: if a developer changes congress grammar, s/he
    needs to compile or download the antlr3 file to generate
    the Parser/Lexer.

    Instructions added to download antlr3 and generate files.

    Partial-Bug: 1591763

    Change-Id: I716ffe9f651dc48eb513efbb653aadf8f33f604a