Merge pull request #32 from jochenberger/use-slf4j

Improve logging
found issues.
API clean up. Reduce static method overloading by fluent API.
Improved Exception handling.
Improved API and added some doc.
Improved array slicing.
Fixed issue 36 - deep scan for arrays.
'AND' (&&) support in ArrayEvalFilter.
Removed apache commons dependencies.
Prepared for release.
Updated pom with latest sonatype parent.
Fixed java 6 build issue.
[maven-release-plugin] prepare release json-path-0.9.0
[maven-release-plugin] prepare for next development iteration
Update README
Merge remote-tracking branch 'upstream/master'