Adding ability to pass in shape options as a paramater to further configure the size and shape of individual particles, even passing in images!

[Larkenx]

The only issue I've had so far is when I build the project, it appears to throw an UglifyJS error. I'm guessing maybe the spread operator isn't supported? Here's an example using the new options prop:

<vue-particles 
    shapeType="image" 
    :shapeOptions="{
          image: {
            src: 'static/heart.png',
            width: 40,
            height: 40
          }
        }"
    color="#d33838" :lineLinked="false"/>

[Larkenx]

We may want to see if these changes can be integrated into #32

[blabut]

Hi, I would love to use the custom shape option, is there any plan to integrate it? Thank you for the awesome work!