rewrite and reoganize tools functions

* create stdext namespace which contains additional C++ algorithms
* organize stdext in string, math, cast and exception utilities

TODO

@@ -46,6 +46,7 @@ move rendering of creatures names, skulls, etc to UI and scripts
 clean sprites cache periodically
 handle corrupt errors in dat/spr
 throw exceptions when fail to read a file
+fix C++ exceptions messages inside onExtendedOpcode
 
 * framework
 rework Settings/g_configs