Multi tab layout

[frytimo]

This is a major update for the built-in editor. Adding the following features:

• Multi-tab layout - multiple files can now be open at the same time.
• New status bar - Gives status updates on opening, saving, and cursor and line movements.
• File modified indicator - The file name in the tab will show an asterisks (*) when the file has been modified from the original state.
• Highly improved PHPDoc blocks - Now detects $this->, self::, static::. Static methods and object methods are handled independently to show only when relevant.
• File type management - When the syntax type is changed from the drop-down list, the editor will remember the syntax for that tab.

Adjusting the index.php file was necessary for me to organize the Javascript, HTML, Styles, and PHP in their own section dedicated for that type. This was needed for me to better follow the code during debugging.