added badges for linux and windows ci builds
added badges for linux and windows ci builds

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