Moved server selection styles to launcher.css, as they are nearly finished.
Moved overlay convenience functions to overlay.js.
Moved launch area (landing.ejs) convenience functions to landing.js.
Various cleanups and documentation also added.
Separate views are stored in an ejs file. When the app starts, each file will be loaded, with the DOM elements hidden. Based on the state of the application, a specific view will be fadded in. Switching between views will use this principle.
Moved contents of index.ejs to landing.ejs to make it compatible with the new format. As a result, index.ejs is deprecated and will be removed once it is no longer needed for reference.
