JSON Escape / Unescape

Escapes or unescapes a JSON string removing traces of offending characters that could prevent parsing.

The following characters are reserved in JSON and must be properly escaped to be used in strings:

• Backspace is replaced with \b
• Form feed is replaced with \f
• Newline is replaced with \n
• Carriage return is replaced with \r
• Tab is replaced with \t
• Double quote is replaced with \"
• Backslash is replaced with \\