New Window Scheme and OpenSLL for Windows

Created a new window scheme for the app.

AppWindow will hosts all other windows(called widgets in the code), making it easier to manage.
The app is now frameless with a custom top bar to allow the app to look the same on every platform.

Login remade for new scheme. Library(for owned games), will be the next.

Also added OpenSSL for windows. Explanation at: #14 

![itch](https://cloud.githubusercontent.com/assets/3166433/5530666/4f7ccd22-8a01-11e4-9115-abc561323c43.gif)