Separate dev/prod configs

[manavsehgal]

Can we add separate dev/prod config settings which apply depending on context?

Currently production settings need to be commented out (debug:true) or changed (devtool: 'eval') in webpack.config between dev/prod scenarios. This is not ideal.

There are two prevalent solutions for separate webpack dev/prod configs.
(1) Using npm webpack-merge and environment variables to TARGET dev/prod in same config file. SurviveJS implementation
(2) Using two separate webpack.config files for dev/prod. This is more common solution on most projects I have studied.

[PatrickJS]

I have this and #174 done locally. I'm trying to make it easier and I may end up making 3 webpack configs development, production, and test

[manavsehgal]

@gdi2290 Many thanks for your prompt response and action! Looking forward to pulling this change.

[PatrickJS]

done via cf4b3f2...master