v2.1.4

ce2c01f Fixed lfs_dir_fetchmatch not understanding overwritten tags
0197b18 Fixed issue with superblock breaking lfs_dir_seek
d6dc728 Fixed some issues in lfs_migrate
aeff2a2 Stop wear-leveling during migration
aae22c8 Fixed issue with directories falling out of date after block relocation
60e67ae Fixed implicit change-of-sign warning in lfs_dir_fetch
64dedee prepare upstream bugfix of lfs
5925db4 Fix some LFS_TRACE format specifiers
ab56dc5 README: fix incorrect description