v0.5.5: fixes issue ulikunitz#19

Release 0.5.4

Fixes issue ulikunitz#15.

Release v0.5.3 fixes issue ulikunitz#12 for empty xz streams.

Release v0.5.2

Release v0.5.2 fixes an issue with xz block header padding.

Release v0.5.1 fixing an issue on the 32-bit platform.

Release v0.5

Version v0.4.1: fixes issue ulikunitz#7

Release v0.4 for xz package

v0.3.1: handles github account name change to ulikunitz

Version v0.3: see doc/relnotes/release-v0.3.md for details