docs for mybatis
Merge branch 'm1.mybatis' into m2.entitylifecycle

Conflicts:
	src/main/java/org/javatalks/training/hibernate/mybatisdao/mapper/BookMapper.java
Merge branch 'm2.entitylifecycle' into m2.ids
Merge branch 'm2.ids' into m3.associations.components
Merge branch 'm3.associations.components' into m3.associations.oto
Merge branch 'm3.associations.oto' into m3.associations.collections
Merge branch 'm3.associations.collections' into m4.fetching
Merge branch 'm4.fetching' into m4.bulk