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.

test/dom.t.cpp

@@ -31,23 +31,12 @@
 #include <main.h>
 #include <test.h>
 
-#ifdef HAVE_LIBLUA
-extern "C"
-{
-  #include <lua.h>
-}
-#endif
-
 Context context;
 
 ////////////////////////////////////////////////////////////////////////////////
 int main (int argc, char** argv)
 {
-#if defined(HAVE_LIBLUA)
-  UnitTest t (7);
-#else
   UnitTest t (6);
-#endif
 
   try
   {
@@ -57,9 +46,6 @@ int main (int argc, char** argv)
     // TODO dom.get rc.name
     DOM dom;
     t.is (dom.get ("system.version"),     VERSION,     "DOM system.version -> VERSION");
-#ifdef HAVE_LIBLUA
-    t.is (dom.get ("system.lua.version"), LUA_RELEASE, "DOM system.lua.version -> LUA_RELEASE");
-#endif
     t.ok (dom.get ("system.os") != "<unknown>",        "DOM system.os -> != Unknown");
     t.is (dom.get ("context.program"),    "task",      "DOM context.program -> 'task'");
     t.is (dom.get ("context.args"),       "task",      "DOM context.args -> 'task'");