regenerate Kepler plugin target Java 6
development branch: ignore Ivy build artefacts from version control
add Eclipse settings for local development, ignore classes and copied
libs
development branch: update Eclipse settings after change
9a338d1245b4fcb7b4dc7013ffd2e9e53092359b (add commons-io)
switch back to Java 6 for Kepler/Hadoop 2.2