bump version to v1.3.0
bump version to v1.4.0
bump version to v1.5.0
bump version to v1.5.0
bump version to v1.7.0
bump version to v1.8.0
bump version to v1.8.1
bump version to v1.8.2
bump version to v1.9.0
fix URL of mailing list webpage
bump version to v1.10.0
bump version to v1.11.0
bump version to v1.11.1
bump version to v1.12.0
bump version to v1.12.1
add .gitignore
bump version to v1.13.0
bump version to v1.14.0
bump version to v1.15.0
bump version to v1.15.1