require fix

The velocity-animte as commonjs package cannot be used at this moment in webpack environment.

The reason is the velicoty.ui.js file's define line
    define([ "velocity" ], factory);

The npm package is called velocity-animate, so that line works only if the define looks like this:

    define([ "velocity-animate" ], factory);

Or the package also should be called simple velocity in the npmjs repository, however that one is already taken...