Added TypeScript Support for Modules

Added Source Mapping to Module Error Reports and console.trace()
Added Error Handling to TypeScript Compilation
Improved Caching

Added Panic Unwind Handler in Native Functions

Allowed for safe functions to be passed to the js_fn macro
Added formatter for functions
Fixed unexpected panics

Added Custom Array and Object Formatters

Improved IonObject;:keys to return keys as strings
Added globals and microtask queue to eval subcommand
Fixed underflow on u16 when counting brackets in REPL
Replaced termcolor with colored
Added .gitattributes

Added Ctrl+C Handler for REPL

Added exit keyword for REPL