Added support for menus based on platform

[ghost]

Also fixed an issue with C…md+Q on debugging the app.

[ghost]

Overview:

• Support for platform specific menu building. Now, main.js pulls from config/.js for customized menus. We might want to change them later, but for now, this is a step in the right direction I feel.
• Use of wavy module. Wavy defines ~/ to be the root of the project directory, so we can now just call const blah = require('~/path/to/module'); All that is needed is to list it in package.json, and install it via npm -install. It runs a post install script, and you dont have to worry about it after that.
• Fix for inability to Cmd+Q while debugging on mac. Added an area in the app.onReady() method for registering keyboards (which fixed the bug), or doing other necessary pre-launch setup.

[vincelwt]

Ok I just tried, however I'm not sure a menu is needed on Linux and Windows. The problem with menus is that it adds (except on OSX and some Linux environments) a bar to the UI.

Which is quite against the minimalistic UI of the app.

However on MacOS it doesn't add something to the UI and allows to use keyboard shortcuts to quit the app and all.

And the menu functions are not very important, so I'd say we better remove the menus from Windows/Linux or add an option to enable it.