Support standard style definitions of transpirable es6 modules

[falsandtru]

Please also review with other owners.

[twada]

@falsandtru Thank you for your PR!!
Would you add some more explanation or reference URL for this PR?

[falsandtru]

For example, http://www.2ality.com/2015/12/babel-commonjs.html

[twada]

@falsandtru Thanks!

@teppeis @vvakame @azu Any thoughts?

[falsandtru]

Another, how about #36 ?

[twada]

@falsandtru Sorry for my late response about #36, replied and marked as wontfix for now though...

[falsandtru]

Also TypeScript emits:

    Object.defineProperty(exports, "__esModule", { value: true });

[vvakame]

sorry for late reply. LGTM. I think we can merge this PR.

[twada]

@vvakame Thank you for your review!

@teppeis Would you review this too?

[falsandtru]

Improved to Object.defineProperty(exports, "__esModule", { value: true });.

[twada]

@falsandtru Thank you for your update.
Would you use define-properties for older browsers?

[falsandtru]

@twada Changed to use define-properties.

[twada]

@falsandtru LGTM.
Now we are going to merge and cut a new release soon.
Thank you for your contribution!

[falsandtru]

All right.

log: change double quotes to single quotes.

[twada]

Released as power-assert 1.3.0. Thank you for your contribution and reviews!