Add findbugs maven plugin.
Remove benchmark.
Upgrade IDNA handling. Fixes #24.

We now use UTS #45 for IDNA as per latest WHATWG URL Standard.
This introduces a dependency on ICU4J.
Move IDNA methods to URLUtils; improve Javadoc.
Tune release site maven code.
Add missing IDEA file.
Some improvements to the release process.
maven: don't force gh-pages overwrite.
[maven-release-plugin] prepare release v0.1.0
[maven-release-plugin] prepare for next development iteration
README: Update stable version.
README: Update domain.
Added concept of ParseIssue to GalimatiasParseException.

Fixes #35.
Add builder methods for URLs. Fixes #16.
Add InetAddress -> IPv{4,6}Address methods. Fixes #12.
maven: Add versions-maven-plugin.
Update logback/slf4j.
Preparing feature/issue-35 branch for merge.
Merge branch 'feature/issue-35'
Fix multiple IPv4/IPv6 parsing bugs. Fixes #41.