Run site/img through ImageOptim
Added Jade Converter to docs/plugins
Merge pull request #1210 from snappylabs/jpap-docs-plugin-jade

Added Jade Converter to docs/plugins
Merge pull request #1208 from mojombo/imageoptim

Run site/img through ImageOptim
Update history to reflect merge of #1208.
Update history to reflect merge of #1210.