Ui 2 shared package (redux, mobx, utils) (#5579)

* Create @parity/shared

* Move ~/util to shared/util

* Move ~/contracts to shared/contracts

* Move ~/config to shared/config

* Move ~/environment to shared/environment

* Updated paths

* Move ~/mobx to shared/mobx

* Move ~/redux to shared/redux

* Add shared to test babel compile

js/webpack/rules/parity.js

@@ -16,6 +16,6 @@
 
 module.exports = {
   test: /\.js$/,
-  include: /node_modules\/@parity\/(abi|api|jsonrpc|ui|wordlist)/,
+  include: /node_modules\/@parity\/(abi|api|jsonrpc|shared|ui|wordlist)/,
   use: 'babel-loader'
 };