v0.2.0

• add sound support!
• add support to redirect text output to the console for debugging using control code 6
• update curlywas:
  • add support for else if
  • add support for escape sequences in strings
  • add support for char literals
  • add support for binop-assignment, eg. +=, ^=, <<= etc. (also support for the tee operator: +:=)
  • "integer constant cast to float" literal syntax in CurlyWas (ex. 1_f is equivalent to 1 as f32)