272-javascript-export-1-export-menu-option

• Added JavaScript export option to export menu.
• Added empty search/replace template (to be filled in later).
• Created empty stub methods for most implementations (to be filled in later).

• Export feature works without problems/errors, but currently only generates an empty .html file.

Fixed after feedback from: #27

• Fixed formatting.
• Added stub method TODO's.
• Added documentation.
• Javascript -> JavaScript.
• Renamed main.html -> index.html