Added methods in FileSystemInfoExtension class for enumeration of file system elements without parental context but with output of custom objects

Added methods in FileSystemInfoExtension class for enumeration of file system elements without parental context but with output of custom objects.

Added support for asynchronous event raising with synchronous and awaitable handlers.

Added support for asynchronous event raising with synchronous and awaitable handlers. Improved filtering on the return value of awaitable methods. Returned the old Reflector class member names renamed in the previous release.
This release contains all the functionality that the Reflector class currently supports.