add supprt for carbonlink in gzipped whisper reader, don't read whisper header twice
add supprt for carbonlink in gzipped whisper reader, don't read whisper header twice

brutasse/graphite-web,obfuscurity/graphite-web,obfuscurity/graphite-web,DanCech/graphite-web,graphite-project/graphite-web,DanCech/graphite-web,deniszh/graphite-web,criteo-forks/graphite-web,brutasse/graphite-web,cbowman0/graphite-web,graphite-project/graphite-web,drax68/graphite-web,drax68/graphite-web,brutasse/graphite-web,deniszh/graphite-web,obfuscurity/graphite-web,graphite-project/graphite-web,cbowman0/graphite-web,brutasse/graphite-web,mcoolive/graphite-web,graphite-project/graphite-web,criteo-forks/graphite-web,cbowman0/graphite-web,DanCech/graphite-web,brutasse/graphite-web,obfuscurity/graphite-web,graphite-project/graphite-web,mcoolive/graphite-web,mcoolive/graphite-web,cbowman0/graphite-web,mcoolive/graphite-web,brutasse/graphite-web,deniszh/graphite-web,drax68/graphite-web,drax68/graphite-web,DanCech/graphite-web,criteo-forks/graphite-web,cbowman0/graphite-web,obfuscurity/graphite-web,deniszh/graphite-web,mcoolive/graphite-web,drax68/graphite-web,cbowman0/graphite-web,criteo-forks/graphite-web,DanCech/graphite-web,drax68/graphite-web,criteo-forks/graphite-web,graphite-project/graphite-web,obfuscurity/graphite-web,deniszh/graphite-web,criteo-forks/graphite-web,mcoolive/graphite-web,DanCech/graphite-web,deniszh/graphite-web