重构内部实现
Merge branch 'master' of git@github.com:dayatang/dddlib.git

Conflicts:
	dddlib-domain/src/main/java/org/dayatang/domain/internal/AbstractCriterion.java
	dddlib-domain/src/main/java/org/dayatang/domain/internal/AndCriterion.java
	dddlib-domain/src/main/java/org/dayatang/domain/internal/BasicCriterion.java
	dddlib-domain/src/main/java/org/dayatang/domain/internal/EqCriterion.java
	dddlib-domain/src/main/java/org/dayatang/domain/internal/OrCriterion.java