Better docs for writeAsyncSync clusterperf output.
Better docs for writeAsyncSync clusterperf output.

Fixes RAM-412.

SMatsushi/RAMCloud,matrix207/RAMCloud,anirajk/RAMCloud,rstutsman/RAMCloud,IMCG/RamCloud,rstutsman/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,utah-scs/RAMCloud,Frank-Wu/RamCloud,rstutsman/RAMCloud,mrdiegoa/ramcloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,behnamm/cs244b_project,jblomer/ramcloud,alexandermerritt/ramcloud,QingkaiLu/RAMCloud,DavidLi2010/ramcloud,utah-scs/RAMCloud,y-higuchi/ramcloud,mrdiegoa/ramcloud,IMCG/RamCloud,DavidLi2010/ramcloud,jcarreira/ramcloud,jcarreira/ramcloud,jcarreira/ramcloud,behnamm/cs244b_project,jblomer/ramcloud,QingkaiLu/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,SMatsushi/RAMCloud,jblomer/ramcloud,Frank-Wu/RamCloud,y-higuchi/ramcloud,Frank-Wu/RamCloud,alexandermerritt/ramcloud,anirajk/RAMCloud,alexandermerritt/ramcloud,behnamm/cs244b_project,taschik/ramcloud,matrix207/RAMCloud,matrix207/RAMCloud,matrix207/RAMCloud,jcarreira/ramcloud,IMCG/RamCloud,jcarreira/ramcloud,y-higuchi/ramcloud,anirajk/RAMCloud,anirajk/RAMCloud,mrdiegoa/ramcloud,utah-scs/RAMCloud,behnamm/cs244b_project,y-higuchi/ramcloud,utah-scs/RAMCloud,IMCG/RamCloud,anirajk/RAMCloud,taschik/ramcloud,behnamm/cs244b_project,utah-scs/RAMCloud,taschik/ramcloud,mrdiegoa/ramcloud,y-higuchi/ramcloud,Frank-Wu/RamCloud,mrdiegoa/ramcloud,QingkaiLu/RAMCloud,rstutsman/RAMCloud,DavidLi2010/ramcloud,SMatsushi/RAMCloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,IMCG/RamCloud,alexandermerritt/ramcloud,utah-scs/RAMCloud,matrix207/RAMCloud,IMCG/RamCloud,QingkaiLu/RAMCloud,behnamm/cs244b_project,jblomer/ramcloud,SMatsushi/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,taschik/ramcloud,DavidLi2010/ramcloud,jblomer/ramcloud,jcarreira/ramcloud,taschik/ramcloud,alexandermerritt/ramcloud,y-higuchi/ramcloud,alexandermerritt/ramcloud,DavidLi2010/ramcloud,matrix207/RAMCloud,DavidLi2010/ramcloud,mrdiegoa/ramcloud