0.5.3

• Default arguments now support compile-time constant variables, unary -, and pseudo-unary +
• Re-added os.remove & os.rename because they originated in Lua and should not have been removed
• Fixed some instances of errors not providing a code snippet and reporting the wrong line
• Fixed enumerators being limited to 32-bit values
• Fixed warning disable/enable being global-only
• Removed if-goto optimisation due to various edge cases where goto is not executed