Distinguish between SVG <text> elements and normal text

[nthcolumn]

$text needs to render node when it is svg and a html text node otherwise.

[gliechtenstein]

This has been fixed with https://github.com/intercellular/cell/pull/164

Nice example by @nthcolumn https://jsfiddle.net/o4bck4eh/ thanks for reporting and coming up with the example!