Bug fixes

Fixes CommonJS module loading. Closes #232. Closes #238.

Allow animating with the raw utility function (Velocity) instead of its
property (Velocity.animate), e.g. $.Velocity(element, propertiesMap,
options);

Copy over _cacheValues option for the UI pack. Closes #239.

Reverts Velocity.mock to original (asynchronous) behavior. Closes #237.

Fixes IE7 error throwing in UI pack. Closes #246.