Restructure JavaScript Code

[Struanjh]

• Create common map.js file which will contain common google maps api code used across all pages which load the map
• Remove duplicate google maps api code from various js files (use map.js instead)
• Identify common variables the map.js file will need access to (i.e. points on the map will be populated differently depending on what page is being loaded)
• Remove app.js file & move the user functions defined there into seperate files

[Struanjh]

Submitted Pull Request. Waiting Approval