Comply with Xiphoseer required changes.

Remove the CDClientDatabase::ExecuteQueryWithArgs() function and replace 
it with CDClientDatabase::CreatePreppedStmt().

This prevents a developer from accidently using %s, or incorrectly 
passing std::string, and causing a silent error.

dDatabase/CDClientDatabase.cpp

@@ -13,3 +13,8 @@ void CDClientDatabase::Connect(const std::string& filename) {
 CppSQLite3Query CDClientDatabase::ExecuteQuery(const std::string& query) {
     return conn->execQuery(query.c_str());
 }
+
+//! Makes prepared statements
+CppSQLite3Statement CDClientDatabase::CreatePreppedStmt(const std::string& query) {
+    return conn->compileStatement(query.c_str());
+}