Release 0.2.0

Release 0.2.0 has greatly improved standards library support.

• command line
  • add version subcommand
• compiler
  • fix a bug in floating point comparisons with NaN values
  • fix a bug when calling panic in package initialization code
  • add support for comparing complex64 and complex128
• cgo
  • add support for external globals
  • add support for pointers and function pointers
• standard library
  • fmt: initial support, fmt.Println works
  • math: support for most/all functions
  • os: initial support (only stdin/stdout/stderr)
  • reflect: initial support
  • syscall: add support for amd64, arm, and arm64