Update README.md with freerouting-1.9.0.jar executable

Update version numbers in README

Update filenames to release v1.7.0

Update metadata.json

Change version to 1.6.2

Change version number to 1.6.1

Change version number to 1.6.0

Update README.md

Update README.md

Merge branch 'master' of https://github.com/freerouting/freerouting