Don't force sourcemaps on for JSXTransformer APIs

In case somebody doesn't want sourcemaps (eg, react-rails) or r.js
Fix bad merge from 04c9820694ac07bb88d3dda32bf35a063c3c61a4

Didn't sync out correctly.
remove doubled whitespace chars in jsDoc
Upgrade Commoner

It no longer parses @providesModule directives by default.

Fixes #1145
Iterate over expectedFeatures correctly

This fails if Array.prototype is extended.
Fixed incorrect test.