Merge pull request jashkenas#3978 from jridgewell/1.3.2-rc

Backbone 1.3.2

Bump to v1.3.1

Because I screwed up the 1.3.0 release by not building the min files...
Sorry everyone.

Build v1.3

1.3.0

Backbone.js 1.2.3

Backbone.js 1.2.2

Backbone 1.2.1

Backbone.js 1.2.0 (I think)

Backbone 1.1.2

Backbone.js 1.1.1