Copied docs from header to cc for convertExceptionsToDoesntExist.
Copied docs from header to cc for convertExceptionsToDoesntExist.

Fixes RAM-452.

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