Upgrade findbugs-manve-plugin from 2.5.3 to 3.0.0, upgrade minimum maven version from 2.2.2 to 3.0.1.
Upgrade jackson from 2.3.3 to 2.4.2.
Fix javadoc.
Bump version number from 1.4.0 to 1.5.0-SNAPSHOT, upgrade XChange from 2.0.0 to 2.1.0-SNAPSHOT.