Revert "Improve namespace names"

This reverts commit 973df43fe0.

On a second thought, namespaces are close to classes in the sense that both encapsulate data, so they should both use Pascal case notation.

packages/CLPBN/horus/LiftedUtils.cpp

@@ -105,7 +105,7 @@ Substitution::getDiscardedLogVars (void) const
   std::unordered_map<LogVar, LogVar>::const_iterator it
       = subs_.begin();
   while (it != subs_.end()) {
-    if (util::contains (doneLvs, it->second)) {
+    if (Util::contains (doneLvs, it->second)) {
       discardedLvs.push_back (it->first);
     } else {
       doneLvs.insert (it->second);