Update gitignore, NEWS, and TODO. #337

Job	Run time
skip_duplicates	4s
O0-Buildflags (gcc, --enable-obsolete-api --enable-hashes=all --enable-failure-tokens)	1m 50s
O0-Buildflags (gcc, --enable-obsolete-api --enable-obsolete-api-enosys --enable-hashes=all --enab...	1m 45s
O0-Buildflags (gcc, --disable-obsolete-api --enable-hashes=all --enable-failure-tokens)	1m 49s
O0-Buildflags (gcc, --disable-obsolete-api --enable-failure-tokens --enable-hashes=strong)	1m 27s
O0-Buildflags (gcc, --enable-obsolete-api --disable-failure-tokens --enable-hashes=descrypt)	29s
O0-Buildflags (clang, --enable-obsolete-api --enable-hashes=all --enable-failure-tokens)	2m 0s
O0-Buildflags (clang, --enable-obsolete-api --enable-obsolete-api-enosys --enable-hashes=all --en...	1m 59s
O0-Buildflags (clang, --disable-obsolete-api --enable-hashes=all --enable-failure-tokens)	1m 59s
O0-Buildflags (clang, --disable-obsolete-api --enable-failure-tokens --enable-hashes=strong)	1m 33s
O0-Buildflags (clang, --enable-obsolete-api --disable-failure-tokens --enable-hashes=descrypt)	34s
	15m 29s

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