Added copy to clipboard function for item JSON

- [ZeroClipboard](http://zeroclipboard.org/) library to copy text to the
clipboard
- Removed "selectText()" function
- Missing response tooltip that text has been successfully copied
Replaced Copy Icon

- Replaced the Select Text icon with a Copy icon.
- Also, Fixed #41 - Removed reference to the 'Highlight' folder in
web.config.
Added Syntax Highlighting to WKT

- Fixed #38
Fixed Section Title Hiding Under Page Header

- Fixed #39
Added preventing accidental closure of page

- Closed #40
- Thanks @amarinelli
Added Subtypes under FeatureServer Layer

- Closed #31
- Added 'esriFeatureEditTool' enum.
Added 'Loading' indicator

- Closed #45