Version 0.2.0

Changes:

• Split writing data out into chunks instead of attempting to write the entire file at once
  • Fixes file size limitation
• Added some progress feedback output
• Pressing Ctrl-C will close file buffers & exit cleanly
• Support command-line options:
  • help: show a help message
  • version: show version info
  • chunksize: set chunk write size
  • stdvector: additionally store data in std::vector