Merge pull request #956 from fullflavedave/master

Meteor type definitions
Add TypeScript definition file for JointJS Graphic Library (http://www.jointjs.com)
Added type definitions and tests for underscore.string library
Updated JSDoc for sprintf and numberFormat
Merge pull request #957 from rygine/master

Added type definitions and tests for underscore.string library
SoundInstance.plau() has optional parameters
Merge pull request #958 from areel/master

Add TypeScript definition file for JointJS Graphic Library (http://www.jointjs.com)
Merge pull request #959 from artsjedi/master

SoundInstance.play() has optional parameters
IHttpPromise updates

success/error should retain the promise type
also, the callback return should be void, any return value doesn't seem to be carried anywhere: http://jsfiddle.net/9syMH/
winjs/winrt from TypeScript samples
Merge pull request #961 from georgiosd/patch-1

IHttpPromise updates
Merge remote-tracking branch 'upstream/master'
Added usage notes