Replaced espree and esprima-walk by babel parser, traverse, and generator. Better semantic for what we want to achieve. It also fixes issues we observed with ember-auto-import
AMD modules are not ES Modules! Up to today we were letting Ember do the dirty job of injecting in the AMD Module prototype the property 'default'. This is creating issues with some AMD modules. We are now taking this into our hands and creating a proxy ES module around the AMD Module.