v2.6.0

Added

• -s/--set sets global symbols, removing use case for *argv*.
• Automated binary builds for Linux, Windows and OSX through Travis.

Changed

• *argv* has been removed.
• -r gets run in left-to-right order like other options.
• -v, -h don't exit immediately after.
• Unrecognized options cause exit with code -1 instead of getting skipped.
• REPL only starts by default if no command line options specified.
• Amended shen.credits to explain exit command.
• Improved help (-h) message.