v0.3.0

Changes since v0.2.0:

• Implements local functions.
• Adds Table.toObject() to transform Lua table to JS object.
• Adds LICENSE file.
• Fixes issue where tostring() was returning userdata for zero-length strings.
• Fixes gsub() result when pattern is anchored to end of string.
• Fixes issue where require() was initialising modules multiple times.
• Fixes issues window.expand not expanding all properties of window.
• Fixes issues calling new() method on function values.
• Fixes issues calling toString() on objects returned from DOMAPI.
• Fixes issues where parser failed when Babel stopped formatting its output (file too long).
• Removes failing optimisation in AssignmentStatement code gen.