maint(dirs): prep for adding bindings

Source tree has been reorganised making way for language
wrappers (bindings) to be added.  RMr soruce is now in
src/rmr, and language specific wrappers will be placed into
subdirectories under src/bindings (e.g. rmr-python).

Change-Id: I2cac4e476e9c803b96cee2640ee2267434009cb1
Signed-off-by: E. Scott Daniels <daniels@research.att.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 225c5f7..cf887cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,9 +168,9 @@
 set( CMAKE_CXX_FLAGS "-g -Wall " )
 
 # Include modules
-add_subdirectory( src/common )
-add_subdirectory( src/nanomsg )
-add_subdirectory( src/nng )
+add_subdirectory( src/rmr/common )
+add_subdirectory( src/rmr/nanomsg )
+add_subdirectory( src/rmr/nng )
 add_subdirectory( doc )				# this will auto skip if {X}fm is not available