File-level documentation for some of src/lib.

src/lib/arch/bytes.h

src/lib/cc/torint.h

src/lib/compress/compress.c

src/lib/compress/compress_buf.c

src/lib/container/bitarray.h

src/lib/container/bloomfilt.h

src/lib/container/buffers.c

src/lib/container/buffers.h

src/lib/container/map.c

src/lib/container/map.h

src/lib/container/order.h

src/lib/container/smartlist.c

src/lib/container/smartlist.h

src/lib/crypt_ops/crypto_pwbox.h

src/lib/crypt_ops/crypto_s2k.h

src/lib/defs/digest_sizes.h

src/lib/encoding/binascii.h

src/lib/encoding/confline.c

src/lib/encoding/confline.h

src/lib/encoding/cstring.c