FLUME-1354. Update docs to show that recoverable memory channel is deprecated.
FLUME-1354. Update docs to show that recoverable memory channel is deprecated.

(Hari Shreedharan via Jarek Jarcec Cecho)

git-svn-id: 53d3f3fd0704a1c59f96c1a27ad3b0852fae272b@1367198 13f79535-47bb-0310-9956-ffa450edef68

iaiengxia/flume,szaboferee/flume,iaiengxia/flume,szaboferee/flume,szaboferee/flume,tinawenqiao/flume,lfzCarlosC/test,lfzCarlosC/test,tmgstevens/flume,iaiengxia/flume,tinawenqiao/flume,tmgstevens/flume,tinawenqiao/flume,tmgstevens/flume,lfzCarlosC/test,szaboferee/flume,iaiengxia/flume,tinawenqiao/flume,tmgstevens/flume,lfzCarlosC/test