yuyang/practice @ 4b65ab5ec3a7c0d920b994e242eb5ed8dd1242c5

yu yang 483c6daea9 add relation model		2 gadi atpakaļ
..
__init__.py	1ce3d90772 create models	2 gadi atpakaļ
base.py	f26a08348e add base model	2 gadi atpakaļ
library_book.py	b177f70f81 create models	2 gadi atpakaļ
relation.py	483c6daea9 add relation model	2 gadi atpakaļ
test.py	ae8dd6b267 add test model	2 gadi atpakaļ