More tools, better startup script for windows
- jdbc-copy: New tool (work in progress)
- sha256: Renamed from sha2
- sha512: New tool
- wikitext: New tool
- wsdldiff: New tool
- Use groovy-2.3.0 to compile all groovy scripts
- gradlew: Use version 1.12 (used to be 1.10, 1.11)
- Fix: Run mini tools via PATH on Windows