HSEARCH-1606 Upgrade to Apache Lucene 4.8.1
HSEARCH-1607 Depend on a version range as OSGi dependency to Apache Lucene
Update Changelog and README in preparation of release
[maven-release-plugin] prepare release 5.0.0.Alpha4
[maven-release-plugin] prepare for next development iteration
HSEARCH-1608 Improve documentation build

- Renamming main asciidoctor file
- Making sure docinfo file matches ascidoctor file
- Enable integration of docinfo by setting the :docinfo: attribute
- Making sure version is rendered in asciidoctor html as well as in docbook output (intentionally using revdate
  in asciidoctor file, even though it is the wrong porperty. However, this will in turn generate the right L&F in
  the docbook output
- Renaming attribute containing the Hibernate Search version
HSEARCH-1609 Resolve deprecation warnings for usage of JBoss Logger annotations
HSEARCH-1610 Automatically enable JDT Annotation Processor support in Eclipse
HSEARCH-1612 Upgrade to JGroups 3.5.0.Beta7