fixed issue 111: Source jars are missing sources for classes written in Groovy
fixed issue 111: Source jars are missing sources for classes written in Groovy

raphw/spock,sebi-hgdata/spock,psideleau/spock,GeeChao/spock,psideleau/spock,alien11689/spock,sebi-hgdata/spock,GeeChao/spock,Fuud/spock,siordache/spock,lokinell/spock,spockframework/spock,alien11689/spock,leonard84/spock,alien11689/spock,raphw/spock,siordache/spock,Fuud/spock,Fuud/spock,paplorinc/spock,lokinell/spock,paplorinc/spock,sebi-hgdata/spock,raphw/spock,paplorinc/spock,Fuud/spock,GeeChao/spock,siordache/spock,lokinell/spock,psideleau/spock