hbase-4906.  book.xml.  added MR summary to RDBMS section in MR chapter.
hbase-4906.  book.xml.  added MR summary to RDBMS section in MR chapter.

git-svn-id: 949c06ec81f1cb709fd2be51dd530a930344d7b3@1208654 13f79535-47bb-0310-9956-ffa450edef68

Eshcar/hbase,intel-hadoop/hbase-rhino,mahak/hbase,lshmouse/hbase,ndimiduk/hbase,joshelser/hbase,mahak/hbase,justintung/hbase,ndimiduk/hbase,intel-hadoop/hbase-rhino,bijugs/hbase,narendragoyal/hbase,ndimiduk/hbase,ultratendency/hbase,vincentpoon/hbase,ndimiduk/hbase,gustavoanatoly/hbase,vincentpoon/hbase,bijugs/hbase,Apache9/hbase,ultratendency/hbase,HubSpot/hbase,amyvmiwei/hbase,mapr/hbase,drewpope/hbase,bijugs/hbase,Guavus/hbase,justintung/hbase,apurtell/hbase,juwi/hbase,HubSpot/hbase,SeekerResource/hbase,mahak/hbase,mahak/hbase,ibmsoe/hbase,mahak/hbase,gustavoanatoly/hbase,HubSpot/hbase,Eshcar/hbase,justintung/hbase,drewpope/hbase,intel-hadoop/hbase-rhino,infospace/hbase,vincentpoon/hbase,StackVista/hbase,Guavus/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,infospace/hbase,juwi/hbase,amyvmiwei/hbase,ChinmaySKulkarni/hbase,intel-hadoop/hbase-rhino,mahak/hbase,vincentpoon/hbase,Guavus/hbase,drewpope/hbase,StackVista/hbase,Eshcar/hbase,SeekerResource/hbase,amyvmiwei/hbase,HubSpot/hbase,JingchengDu/hbase,justintung/hbase,ibmsoe/hbase,infospace/hbase,drewpope/hbase,apurtell/hbase,lshmouse/hbase,bijugs/hbase,JingchengDu/hbase,ultratendency/hbase,ultratendency/hbase,Apache9/hbase,StackVista/hbase,toshimasa-nasu/hbase,apurtell/hbase,gustavoanatoly/hbase,ibmsoe/hbase,toshimasa-nasu/hbase,Apache9/hbase,bijugs/hbase,narendragoyal/hbase,Apache9/hbase,juwi/hbase,francisliu/hbase,ndimiduk/hbase,apurtell/hbase,ibmsoe/hbase,apurtell/hbase,SeekerResource/hbase,francisliu/hbase,Guavus/hbase,apurtell/hbase,ibmsoe/hbase,gustavoanatoly/hbase,ChinmaySKulkarni/hbase,justintung/hbase,Eshcar/hbase,mapr/hbase,joshelser/hbase,lshmouse/hbase,bijugs/hbase,amyvmiwei/hbase,ultratendency/hbase,drewpope/hbase,ibmsoe/hbase,SeekerResource/hbase,mapr/hbase,toshimasa-nasu/hbase,SeekerResource/hbase,Eshcar/hbase,intel-hadoop/hbase-rhino,amyvmiwei/hbase,narendragoyal/hbase,ChinmaySKulkarni/hbase,juwi/hbase,ndimiduk/hbase,Guavus/hbase,amyvmiwei/hbase,toshimasa-nasu/hbase,HubSpot/hbase,StackVista/hbase,lshmouse/hbase,juwi/hbase,joshelser/hbase,juwi/hbase,narendragoyal/hbase,andrewmains12/hbase,justintung/hbase,bijugs/hbase,justintung/hbase,drewpope/hbase,joshelser/hbase,infospace/hbase,amyvmiwei/hbase,francisliu/hbase,Guavus/hbase,JingchengDu/hbase,vincentpoon/hbase,Eshcar/hbase,JingchengDu/hbase,infospace/hbase,narendragoyal/hbase,andrewmains12/hbase,toshimasa-nasu/hbase,francisliu/hbase,vincentpoon/hbase,andrewmains12/hbase,intel-hadoop/hbase-rhino,ChinmaySKulkarni/hbase,intel-hadoop/hbase-rhino,vincentpoon/hbase,joshelser/hbase,justintung/hbase,ultratendency/hbase,drewpope/hbase,bijugs/hbase,StackVista/hbase,ChinmaySKulkarni/hbase,Guavus/hbase,vincentpoon/hbase,narendragoyal/hbase,amyvmiwei/hbase,francisliu/hbase,mahak/hbase,lshmouse/hbase,vincentpoon/hbase,HubSpot/hbase,toshimasa-nasu/hbase,drewpope/hbase,ChinmaySKulkarni/hbase,JingchengDu/hbase,apurtell/hbase,ultratendency/hbase,gustavoanatoly/hbase,Apache9/hbase,JingchengDu/hbase,ndimiduk/hbase,mahak/hbase,intel-hadoop/hbase-rhino,Apache9/hbase,infospace/hbase,vincentpoon/hbase,juwi/hbase,apurtell/hbase,ndimiduk/hbase,andrewmains12/hbase,lshmouse/hbase,mapr/hbase,lshmouse/hbase,Apache9/hbase,ibmsoe/hbase,ndimiduk/hbase,intel-hadoop/hbase-rhino,mahak/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,HubSpot/hbase,gustavoanatoly/hbase,andrewmains12/hbase,intel-hadoop/hbase-rhino,francisliu/hbase,juwi/hbase,HubSpot/hbase,drewpope/hbase,Guavus/hbase,SeekerResource/hbase,toshimasa-nasu/hbase,SeekerResource/hbase,JingchengDu/hbase,JingchengDu/hbase,mapr/hbase,andrewmains12/hbase,StackVista/hbase,SeekerResource/hbase,ChinmaySKulkarni/hbase,lshmouse/hbase,juwi/hbase,Apache9/hbase,ndimiduk/hbase,JingchengDu/hbase,ChinmaySKulkarni/hbase,gustavoanatoly/hbase,StackVista/hbase,amyvmiwei/hbase,Apache9/hbase,mapr/hbase,JingchengDu/hbase,apurtell/hbase,joshelser/hbase,ultratendency/hbase,joshelser/hbase,StackVista/hbase,ibmsoe/hbase,Eshcar/hbase,StackVista/hbase,andrewmains12/hbase,SeekerResource/hbase,ibmsoe/hbase,francisliu/hbase,joshelser/hbase,andrewmains12/hbase,Apache9/hbase,HubSpot/hbase,joshelser/hbase,lshmouse/hbase,francisliu/hbase,gustavoanatoly/hbase,narendragoyal/hbase,ultratendency/hbase,justintung/hbase,francisliu/hbase,ultratendency/hbase,narendragoyal/hbase,HubSpot/hbase,lshmouse/hbase,Eshcar/hbase,ibmsoe/hbase,SeekerResource/hbase,bijugs/hbase,bijugs/hbase,mapr/hbase,mahak/hbase,narendragoyal/hbase,toshimasa-nasu/hbase,Eshcar/hbase,narendragoyal/hbase,StackVista/hbase,Eshcar/hbase,joshelser/hbase,andrewmains12/hbase,andrewmains12/hbase,gustavoanatoly/hbase,mapr/hbase,toshimasa-nasu/hbase,justintung/hbase,amyvmiwei/hbase,Guavus/hbase,mapr/hbase,gustavoanatoly/hbase,infospace/hbase,Guavus/hbase