* Start to fill in save related classes

* Fix silly bug in WiiSave
* Fix typos in Utilitiy.*

src/Athena/Utility.cpp

@@ -374,5 +374,22 @@ atUint64 fileSize(FILE* f)
     return size;
 }
 
+std::string& ltrim(std::string& s)
+{
+    s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
+    return s;
+}
+
+std::string& rtrim(std::string& s)
+{
+    s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
+    return s;
+}
+
+std::string& trim(std::string& s)
+{
+    return ltrim(rtrim(s));
+}
+
 } // utility
 } // Athena