Add LICENSE file to satisfy the lawyer in you

Cmake improvements

The directory can be overriden by setting the CMake variable OPENSSL_ENGINES_DIR

CMakeLists.txt uses `add_test` to execute `test/run_tests` which does the same thing as the `prove` line did.

GOST 28147-89 test suite from
https://github.com/openssl/openssl/blob/26906f2d93ad4bc092b8b5783d1b35f8c9f0c6d8/engines/ccgost/gost2814789t.c
WIP

Test to validate curve parameters

NID_id_tc26_gost_3410_2012_256_paramSetA
NID_id_tc26_gost_3410_2012_512_paramSetC

test_context: make tests return values affect overall test result

In-place encryption tests and fixes

Currently, for Grasshopper only.