Osx safari Unexpected keyword 'const'. Const declarations are not supported in strict mode.
I receive following error in safari and chrome on devices like iPhone 6S
```
SyntaxError: Unexpected keyword 'const'. Const declarations are not supported in strict mode.
```
I found that problem is in `material-color` library that is used in this project. Added comment to closed issue https://github.com/shuhei/material-colors/issues/13

To compile my app I use webpack2. I do exclude node_modules from compilation so I cant use babel plugin to parse it http://stackoverflow.com/questions/33878586/safari-babel-webpack-const-declarations-are-not-supported-in-strict-mode