Reviewed-by: NTim Hudson <tjh@openssl.org>

Add support for key wrap algorithms via EVP interface.

Generalise AES wrap algorithm and add to modes, making existing
AES wrap algorithm a special case.

Move test code to evptests.txt

Submitted by: Antony, Benoy <bantony@ebay.com>
Approved by: steve@openssl.org

Fix bug in AES wrap code when t > 0xff.

Generalise RecipientInfo and enveloped data handling so applications can
add their own key lookup routines as well as using the standard ones.

Initial support for CMS.

Add zlib compression BIO.

Add AES key wrap implementation.

Generalize S/MIME MIME code to support CMS and/or PKCS7.