Improved FUNC_URI regex so that it works in IE
Improved FUNC_URI regex so that it works in IE

Previously, IE would include the quotes in the first group returned from
the RegExp and URL encode it once the new URL was applied, meaning the
SVG would break. This makes sure the quotes aren't included in the
group.

jeffbcross/angular-svg-base,jeffbcross/angular-svg-base,jeffbcross/angular-svg-base