Install: Use npmconf to get proxy config

[am11]

Fixed #588.

//cc @kevva

[coveralls]

Coverage remained the same when pulling 64bd7b8 on am11:master into 0add991 on sass:master.

[coveralls]

Coverage remained the same when pulling 2cc36c4 on am11:master into f5f48bd on sass:master.

[am11]

@kevva, so does it LGTY? :)
Its time for v2.

[coveralls]

Coverage remained the same when pulling 07b3571 on am11:master into 97e1563 on sass:master.

[coveralls]

Coverage remained the same when pulling 07b3571 on am11:master into 97e1563 on sass:master.

[kevva]

👍

[am11]

@kevva is @api a legal jsdoc block type (identifier)? I could not find that one on http://usejsdoc.org/.

On that note, I think we need @returns across the board. :)

[kevva]

@am11, I think it's http://usejsdoc.org/tags-access.html but I've always used @api for some reason.

[am11]

Perhaps we can submit a proposal somewhere for @access [private / public / protected / internal]. :)

Or even better: @scope [private / public / protected / internal].