Standart library for JPHP

Std classes:

1. `php\util\Cursor` - map & reduce for arrays and iterators
2. `php\lang\Module` - loading module from files and streams, dump bytecode to file
3. `php\lang\Invoker` - a new approach to call functions/methods
4. `php\lib\str`, `php\lib\char`, `php\lib\bin`, `php\lib\items`, `php\lib\num` util classes