sync
note about difficulty of implementing a fair rwlock
added broken test case
test case and kernel still broken
dirty fix to kernel
added another test case
code beautification
support for kernel normalization
test cases for kernel normalization
test case for compression distance
more test cases for compression distance
added references
more updates to references
improved lee distance
updated man
fixed back tag
sync
first version of bag distance
added normalization
test case for bag distance