hashlib++ VERSION 0.2

The second release has been published: hashlib++ VERSION 0.2 is available. Improvements for the new version:

* ! SHA256 support has been added to hashlib++ !

* Added a Linux/FreeBSD makefile and a "Setup.exe" for Windows to build/install hashlib++ as a static library.

* All files have been renamed using the prefix "hl_" to prevent name collisions.

* Replaced sprintf by using an ostringstream to format the hash to a hex string.