Changed svg width and height attributes to a viewbox attribute , so that the svg can be sized according to its parent. Made sure the svg is added to the parent tag of the embedded script when no parent is supplied on addTo().  Make sit also unnecessary to increase font size as the whole svg can be resized
Problem with height was due to bug in WebKit (https://bugs.webkit.org/show_bug.cgi?id=82489). Added hack to CSS (was already working in firefox)
Merge pull request #9 from rparree/master

Changed svg width and height attributes to a viewbox attribute , so that...