arycon query: fix typo in usage example

Test Plan: read the example and compared to actual parameters

Reviewers: jevripio

Reviewed By: jevripio

CC: arcyd

Differential Revision: https://sibld.phab.dev.bloomberg.com/D179
Added common substitutions to unicode conversion

Summary:
This commit adds the ability to perform some common substitutions to the
unicode-to-ASCII conversion in phlsys_textcontext. Currently it supports
replacing various dashes, quotes and bullets with suitable ASCII
alternatives.

Test Plan: Ran included unit tests only.

Reviewers: jevripio

Reviewed By: jevripio

CC: arcyd

Differential Revision: https://sibld.phab.dev.bloomberg.com/D173
barc gc: --update by default

Summary:
To make 'gc' less annoying to use, always assume '--update' if no option
is explicitly supplied.

Later we can replace this default with some sort of heuristic for
whether it's worth checking or not.

Test Plan:
played with barc in
$ ./testbed/arcyd/test_shell.sh
$ ./precommit.sh

Reviewers: jwilkin1

Reviewed By: jwilkin1

CC: arcyd

Differential Revision: https://sibld.phab.dev.bloomberg.com/D187
arcyon query: add '--mine' option

Summary:
Make it easier to filter down to revisions that the current user is
responsible for by adding an alias '--mine' for '--responsible-me'.

Test Plan:
$ arcyon query --mine --status-type open --uri http://127.0.0.1
$ ./precommit.sh

Reviewers: jwilkin1

Reviewed By: jwilkin1

CC: arcyd

Differential Revision: https://sibld.phab.dev.bloomberg.com/D183
arcyd/acceptance_tests: exercise config ref more

Exercise conditions 'no config ref', 'config ref, no repo.json' and
'config ref, repo.json only contains {}'.

Test Plan:
$ ./testbed/arcyd/acceptance_tests.sh
Arcyd: check if config ref exists before loading

Suppress lots of 'ref not found' stderr barf by checking up-front if the
config ref exists.  Only attempt to load if it does.

Test Plan:
$ ./precommit.sh
$ ./testbed/arcyd/acceptance_tests.sh
Merge branch 'feature/showref' into arcyd-review/branchnaming/master