Adding your SVG via <img> element will prevent manipulation with JavaScript. You can get some control of it with CSS, but it has to be part of the SVG code. External stylesheets won't work on the nested elements.   You'll have the most control and options by putting the code inline. That being said, we have had some discussions about injecting the code. Here are a couple threads that may be of interest to you.   Happy tweening.  
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