add new plugin 1.0 release
Fix bad link
fix for os x curl
Merge branch 'gh-pages' of github.com:antlr/website-antlr4 into gh-pages
update tech report
Merge branch 'gh-pages' of github.com:antlr/website-antlr4 into gh-pages
Updated runtime documentation for 4.2.1
Add tool documentation
Updated site content and binaries for release 4.2.1