Explore support IE

[fhelwanger]

IE 11 doesn't support Array#find.

Add polyfill for it and explore if something else is broken.

[nolleto]

All find methods were change to lodash lib and the bug was fixed... but not in all cases.
So I add polyfill by babel and it works.

After that I notice that <foreignObject /> (SVG) is not supported in IE, so I had to remove it. <foreignObject /> was used to displaying long text. I workaround creating <SvgText /> component.

All these were made in ie branch.

[nolleto]

I've tested in IE 11 and I found some bug:

• Fix checkbox position at src/components/PropertiesNetwork/index.js.
  
• The texts inside a node are not showing up. Ref: src/components/SvgText
  
• When a node is created is always positioned at the top left. It should get the position from ContextMenu.
• The site stops working when more than one node is created.
• The site stops working when selecting a node.
• It's not possible to change the network width or height.