Merge pull request #49 from nromanen/master

Merge m->y
Tiles for librarian
tiles, back end validation (reg), img
Merge pull request #51 from nromanen/yurembo

Merge y->m
Merge pull request #52 from nromanen/krivorotenko

Merge k->m
Merge pull request #54 from nromanen/master

Merge m->k