Put graphie labels on top of the SVG
Put graphie labels on top of the SVG

Test Plan: Load [this item](http://perseus.ka.local/test.html#content=%7B%22question%22%3A%7B%22content%22%3A%22%5B%5B%E2%98%83%20image%201%5D%5D%22%2C%22images%22%3A%7B%22web%2Bgraphie%3A%2F%2Fka-perseus-graphie.s3.amazonaws.com%2F6e6c029f07f927829b740f784adde0172f825784%22%3A%7B%22width%22%3A420%2C%22height%22%3A420%7D%7D%2C%22widgets%22%3A%7B%22image%201%22%3A%7B%22type%22%3A%22image%22%2C%22graded%22%3Atrue%2C%22options%22%3A%7B%22title%22%3A%22%22%2C%22range%22%3A%5B%5B0%2C10%5D%2C%5B0%2C10%5D%5D%2C%22box%22%3A%5B420%2C420%5D%2C%22backgroundImage%22%3A%7B%22url%22%3A%22web%2Bgraphie%3A%2F%2Fka-perseus-graphie.s3.amazonaws.com%2F6e6c029f07f927829b740f784adde0172f825784%22%2C%22width%22%3A420%2C%22height%22%3A420%7D%2C%22labels%22%3A%5B%5D%2C%22caption%22%3A%22%22%7D%2C%22version%22%3A%7B%22major%22%3A0%2C%22minor%22%3A0%7D%7D%7D%7D%2C%22answerArea%22%3A%7B%22type%22%3A%22multiple%22%2C%22options%22%3A%7B%22content%22%3A%22%22%2C%22images%22%3A%7B%7D%2C%22widgets%22%3A%7B%7D%7D%2C%22calculator%22%3Afalse%7D%2C%22itemDataVersion%22%3A%7B%22major%22%3A0%2C%22minor%22%3A1%7D%2C%22hints%22%3A%5B%5D%7D) in Chrome, Firefox, and IE10 and notice all the labels are visible.

Reviewers: emily

Reviewed By: emily

Subscribers: aria, kevinb

Differential Revision: https://phabricator.khanacademy.org/D16519

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