Release v1.5.1 on 2021-02-24.

1. b93f60f conv_acc: Our code requires SSSE3, not just SSE3 by Harald Welte · 7 years ago
2. e08da97 Fix/Update copyright notices; Add SPDX annotation by Harald Welte · 7 years ago
3. 17518fe doxygen: unify use of \file across the board by Neels Hofmeyr · 7 years ago
4. 46e533c core/conv: update description headers for conv_acc_* by Vadim Yanitskiy · 7 years ago
5. e4fe71c core/conv: use proper filenames by Vadim Yanitskiy · 7 years ago[Renamed (98%) from src/viterbi_sse_avx.c]
6. 0d49f47 core/conv: do not mix up AVX and SSE code by Vadim Yanitskiy · 7 years ago