Added missing links to OpenSSL.

Due to an oversight when building the release, we omitted links to
the required OpenSSL dependency. Both links to the website and to
Win32/Win64 redistributables have been added.

Please note that the OpenSSL installer for Windows does require
you to als install the Visual C++ 2008 redistributables.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>