DSLD fix for Groovy Eclipse 2.7.1
DSLD fix for Groovy Eclipse 2.7.1

- also added some comments and set 2.7.1 as the minimum version

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