Add API for cache loading, deleting and saving to the cmake class.

Migrate existing users of the CacheManager API to use the new
API.  The CacheManager will be going away soon.

Source/cmLoadCacheCommand.cxx

@@ -81,8 +81,8 @@ bool cmLoadCacheCommand
       {
       break;
       }
-    this->Makefile->GetCacheManager()->LoadCache(args[i], false,
-                                             excludes, includes);
+    this->Makefile->GetCMakeInstance()->LoadCache(args[i], false,
+                                                  excludes, includes);
     }
 
 
@@ -173,7 +173,7 @@ void cmLoadCacheCommand::CheckLine(const char* line)
   std::string var;
   std::string value;
   cmCacheManager::CacheEntryType type = cmCacheManager::UNINITIALIZED;
-  if(cmCacheManager::ParseEntry(line, var, value, type))
+  if(cmake::ParseCacheEntry(line, var, value, type))
     {
     // Found a real entry.  See if this one was requested.
     if(this->VariablesToRead.find(var) != this->VariablesToRead.end())