set fko_ctx_t opaque pointers to NULL
allow encryption routines to be called multiple times for the same context (deallocate memory from previous calls)
completed fko_wrapper Rijndael encryption usage
added 'clean' stanza for fko-wrapper Makefile
added global function call number var for fko-wrapper
added fko-wrapper memory validation test
memory leak bug fix for fko_new() to allow multiple calls without requiring external fko_destroy() call
[libfko] free dynamically allocated resources for multiple libfko fcn calls
added decryption tests to fko-wrapper