Added support for Apache Solr, version 4.2.0
Increased memory amount for Maven Surefire plugin
Added support for Apache Solr, version 4.2.1
Refactoring notes
Update README.md
New supported Apache Solr versions added to README.md and pom.xml description
Refactoring of 4_x_x External Artifacts class hierarchy.
Removed refactoring notes.
Fixed a typo in a method name
Javadocs for the ExternalArtifacts class
Merge pull request #20 from ffbit/solr-4.x.x-support

Solr 4.x.x support