Tagging version 1.2.1

Tagging v1.2.1rc1

Version bump.

Tagging 1.2.0rc3

Tagging 1.2.0rc2

Tagging 1.2.0rc1

Merge pull request matplotlib#961 from WeatherGod/issue-807-AutoMinor…

…Locator

Issue 807 auto minor locator

Merge pull request matplotlib#938 from jkseppan/simplify-ttconv-loop

Simplify ttconv loop

Tagging v1.1.0 release

Only set ARCH_FLAGS if it hasn't been set already