add @visitYield
generate sourcemaps
ignore .map's
more jscfa2 cleanup/work
Merge branch 'master' of https://github.com/carlosalberto/echo-js into carlosalberto-master
Merge pull request #20 from carlosalberto/master

Initial impl of Array.from()
Merge pull request #21 from carlosalberto/master

Array.fill()
fix ifdef c&p
initial ES6 module support
add Array.prototype.filter
add subarray/set (unimplemented) and broken get impl
add support for process.stdout and process.stderr, which act as normal fd streams on 1 and 2 respectively.
add Date.now()
oops, add atoms for the methods added in the previous commits.
make sure property keys are strings before calling consts.string on them
add Array.prototype.filter test
add missing 'else', fixes ObjectPattern variable declaration desugaring. also add test.
misc uninitialized variable test
stream.write in node returns true/false, not undefined
remove the -s flag, and make the import machinery do a bit more in the way of canonicalization in the face of paths.