moved to precomputed golay tables to save RAM on SM1000, correct init of nin in freedv_api

git-svn-id: https://svn.code.sf.net/p/freetel/code/codec2-dev@1802 01035d8c-6547-0410-b346-abe4f91aad63
freedv tx and rx unittests both running on SM1000 with file I/O.  rx speed borderline

git-svn-id: https://svn.code.sf.net/p/freetel/code/codec2-dev@1803 01035d8c-6547-0410-b346-abe4f91aad63