Initial commit
Some initial useful classes.
Add 'libyuriks/' from commit '3ce159555b70fe9227f966ffd5e5faacf41a446a'

git-subtree-dir: libyuriks
git-subtree-mainline: 160651c6c1990199c667e1e194794d1bef9d1175
git-subtree-split: 3ce159555b70fe9227f966ffd5e5faacf41a446a
Import source code.