Extension Mechanism Cleanup

- Cleaned up existing extension debris, in anticipation of the new mechanisms to
  be included in future releases.  This includes install/uninstall and a full
  set of triggers.

CMakeLists.txt

@@ -57,15 +57,6 @@ if (GNUTLS_FOUND)
   set (TASK_LIBRARIES    ${TASK_LIBRARIES}    ${GNUTLS_LIBRARIES})
 endif (GNUTLS_FOUND)
 
-message ("-- Looking for Lua51")
-find_package (Lua51)
-if (LUA51_FOUND)
- message ("-- Found Lua51: ${LUA_LIBRARIES}")
-  set (HAVE_LIBLUA true)
-  set (TASK_INCLUDE_DIRS ${TASK_INCLUDE_DIRS} ${LUA_INCLUDE_DIR})
-  set (TASK_LIBRARIES    ${TASK_LIBRARIES}    ${LUA_LIBRARIES})
-endif (LUA51_FOUND)
-
 #message ("-- Looking for pthread")
 #find_path (PTHREAD_INCLUDE_DIR pthread.h)
 #find_library (PTHREAD_LIBRARY NAMES pthread)