Updated build version for new binary package

Fixed regression from b85d505

Removed macOS warning from README.md

Updated version numbering to match Adobe Exchange

Updated version info for new 2.0.1 release (updated exiv2 binary)

Version 2.0

Now supports automatic JPEG compression powered by jpeg-archive and
mozjpeg.

Added experimental OS X support.

Published version 1.0.0.2 and switched to Amazon S3.