Merge pull request #19 from akochurov/master

trove4j 3.0.3 migration
[maven-release-plugin] prepare release mxcache-2.4.0
[maven-release-plugin] prepare for next development iteration
Merge pull request #20 from akochurov/master

trove4j 3.0.3 migration - fix bug with missing constructor in TupleObjec...
[maven-release-plugin] prepare release mxcache-2.4.1
[maven-release-plugin] prepare for next development iteration
Move to sonatype maven repository
Update mxcache-asm project, add javadoc and gpg plugins
Fix javadocs, use maven plugin java5 annotations instead of javadoc annotations in mxcache-maven-plugin