0.5.0

• Added ability to import external source files using import <path>.
• Added namespacing for std lib functions.
  • Sys.println(s)
  • Sys.print(s)
  • Sys.read_line()
  • String.length(s)
  • String.char_at(s, n)
  • String.split(s, d)
  • Math.PI
  • Math.abs(n)
  • Math.floor(n)
  • Math.sqrt(n)
  • File.read_utf8(p)
  • File.read_utf8(p, s)
  • Array.push(a, v)
  • Array.pop(a)
  • Array.length(a)
  • Array.map(a, cb)
• Added support for single-line comments using //.
• Added null type.
• Added support for != operator.
• Added support for <= and >= operators.
• Added support for && and || operators (short-circuit evaluation).
• Added support for else if.
• Added --no-debug flag to omit debug data from bytecode.
• Expressions now implicitly return the last expression if ; is omitted.
• Expressions that don't evaluate to a value now return null.
• Values of objects can now be accessed using . ({test: 1}.test).
• Changed string concatenation operator to ><.
• Fixed wrong scope of function parameters.
• Fixed unary operator not working properly on object/array indices.
• Snekky will no longer evaluate the bytecode if --dump flag is present.