Increment version for 0.11.4

Increment version for 0.11.4 first beta

Merge pull request ianyh#614 from ianyh/development

0.11.3

Increment version for 0.11.3b3

Merge pull request ianyh#556 from ianyh/0.11.2

0.11.2

Increment version for Amethyst 0.11.1

Update README for a couple of missing commands and macOS version requ…

…irements

Increment version for first Amethyst 0.11.0 release candidate

Bump version for 0.11.0 beta 4

Bump version for third 0.11.0 beta