adding @loader module, needs docs if it works
Current loader work with es6 syntax
Updated SystemJS

This updates SystemJS further to be based on the latest
es6-module-loader master with a fix for loader.import sharing promises.
Adding documentation for @loader
Removing use of __useDefault

Removing all uses of __useDefault in tests. We're no longer going to
support having the `default` export in es6 modules being imported into
non-es6 as the module's value. SystemJS no longer supports this and
hacking it back in would be unnecessarily difficult. There's no real
need for the feature anyways.
New build based on latest es6ml/systemjs
Adds documentation for System.import

This adds documentation for `System.import` and adds it to the Functions group. Happy to move it somewhere else if there is a better place. Fixes #239
Override instantiate to ensure @config is executed first

This changes how `System.main` is run in production. Since we are now
going to be transpiling `@config` to AMD, we need a way to execute it
before anything else is defined. We can do this by overriding
System.instantiate and loading `@config` and it's dependencies before
anything else is instantiated.
Updates to latest systemjs

Updates to the latest systemjs which is based on the latest es6ml
fixes #256
Merge pull request #257 from bitovi/fixing-less

fixes #256
Browser compatibility for es6

Adds a note about browser compatibility for es6 syntax with PhantomJS.
Fixes tests not running in Travis

Tests weren't running in Travis because we were using Testee #master
which had changed the way it's Grunt task worked. So I'm updated the
task and set a version number of Testee to use so this doesn't happen
again.
Merge pull request #263 from bitovi/es6-phantom

Browser compatibility for es6
Merge branch 'testee' into minor
Merge branch 'system-import-docs' into minor
Make steal.dev.log work in Node

steal.dev.log was expecting to have a `window` which caused it not to
work in Node. This is a problem because steal calls `steal.dev.log`
after it starts up, and will do that even in Node (such as when running
    builds). This fixes #246