Clone OpenSSL

Latest OpenSSL 1.0.1g is cloned from the official site.
License update

OpenSSL license is duplicated on the repository root folder.
Visual Studio projects are added

Visual Studio 2012 solution contains projects for dynamic and static
compilation of libeay32 and ssleay32.
WP8 platform related changes

Random numbers generator now is seeded using std::random_device class
instead of other not available on WP8 sources of entropy.
WP8 platform related changes

Small modification to conform with WP8 API.