1.0.1

• Fix parsing ID3v2.3 frame sizes. Earlier id3v2 didn't parse correctly v2.3 frame sizes. Huge thanks to @rstemmer for pointing to v2.3 size format #13, #34
• Reduce memory allocations in encoding operations 211759e
• Performance compared to v1.0.0:

name                   old time/op    new time/op    delta
ParseAllFrames-4         77.4µs ± 6%    77.1µs ± 5%   -0.36%  (p=0.690 n=5+5)
ParseAllFramesISO-4      78.7µs ± 3%    76.3µs ± 1%   -3.01%  (p=0.008 n=5+5)
ParseArtistAndTitle-4    2.40µs ±16%    2.45µs ±15%   +2.06%  (p=0.690 n=5+5)
Write-4                  6.89µs ± 4%    6.79µs ± 2%   -1.56%  (p=0.310 n=5+5)
WriteISO-4               11.0µs ± 0%     9.4µs ± 0%  -14.65%  (p=0.016 n=4+5)

name                   old alloc/op   new alloc/op   delta
ParseAllFrames-4          263kB ± 0%     263kB ± 0%   -0.01%  (p=0.095 n=5+5)
ParseAllFramesISO-4       264kB ± 0%     264kB ± 0%   -0.08%  (p=0.008 n=5+5)
ParseArtistAndTitle-4      732B ± 1%      734B ± 1%   +0.25%  (p=0.460 n=5+5)
Write-4                  2.55kB ± 0%    2.55kB ± 0%     ~     (all equal)
WriteISO-4               6.99kB ± 0%    6.39kB ± 0%   -8.58%  (p=0.000 n=5+4)

name                   old allocs/op  new allocs/op  delta
ParseAllFrames-4           62.0 ± 0%      61.0 ± 0%   -1.61%  (p=0.029 n=4+4)
ParseAllFramesISO-4        76.6 ± 1%      66.0 ± 0%  -13.84%  (p=0.008 n=5+5)
ParseArtistAndTitle-4      14.6 ±11%      14.6 ±11%     ~     (p=1.000 n=5+5)
Write-4                    35.0 ± 0%      35.0 ± 0%     ~     (all equal)
WriteISO-4                 80.0 ± 0%      50.0 ± 0%  -37.50%  (p=0.008 n=5+5)