Bumb version to 0.4.0

pom.xml

protected/biopet-gatk-extensions/pom.xml

protected/biopet-gatk-pipelines/pom.xml

protected/biopet-protected-package/pom.xml

protected/pom.xml

public/bam2wig/pom.xml

public/bammetrics/pom.xml

public/basty/pom.xml

public/biopet-framework/pom.xml

public/biopet-public-package/pom.xml

public/carp/pom.xml

public/flexiprep/pom.xml

public/gears/pom.xml

public/gentrap/pom.xml

public/kopisu/pom.xml

public/mapping/pom.xml

public/pom.xml

public/sage/pom.xml

public/shiva/pom.xml

public/toucan/pom.xml