Remove brew-mirror-check command

This command uses removed API and is thus broken. It can always be
retrieved from the git history.
Remove download_strategy from SoftwareSpec
Update method call
create: pull requires out of method
create: make conditional more obvious
Hoist assignment to simplify a conditional
pygobject3: added comment to clarify which tests are which.

Closes #26929.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
youtube-dl 2014.02.22.1

Closes #26928.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
qscintilla2: add Python 3 support

Closes #26601.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
brew-test-bot: further tweak cleanup handling.
brew-test-bot: don't force-fetch deps.
CODEOFCONDUCT: add Homebrew CoC, diversity doc.

Add the Homebrew Code of Conduct and Diversity statement.

These are heavily based on those created by Python:
http://www.python.org/psf/codeofconduct/
http://www.python.org/community/diversity/

Closes #26904.
libvirt: add 1.2.1 bottle.
gpgme: add 1.4.3 bottle.
dnsmasq: add 2.68 bottle.
libassuan: add 2.1.1 bottle.
geoip: add 1.6.0 bottle.
s3cmd: add 1.0.1 bottle.
nginx: add 1.4.5 bottle.
memcached: add 1.4.17 bottle.