Bump Conduit server version

Summary:
We introduced a "user.query" call recently which is only about two weeks old. Bump versions so users get a forced upgrade.

Also, we raise a fairly confusing message when the user calls a nonexistent method. This is not the intent; class_exists() throws. Tailor this exception more carefully.

Test Plan:

• Ran echo {} | arc call-conduit derp.derp, got a better exception.
• Bumped version, ran arc list, got told to upgrade.

Reviewers: indiefan, nh, vrana, btrahan, jungejason, Makinde

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D2527