Highlights:
* Added a new ID3 tag manipulation library (libid3tag).
* Fixed a possible segmentation fault due to mmap() abuse.
* Added a 64-bit FPM negation operation to improve performance of subband
synthesis on some platforms.
* Added rounding to Layer III requantization for slightly better accuracy.
* Modified the PCM dithering routine for better dithered output.
* Added TTY controls and new --tty-control and --no-tty-control options to
`madplay'. TTY control keys: `P' pause, `S' stop, `Q' quit, `F' forward,
`B' backward.
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