Merge branch 'tw_basic_service' into 'master'

src/main/java/com/ic/er/Trans.java

src/main/java/com/ic/er/bean/dto/.gitkeep

src/main/java/com/ic/er/bean/dto/AttributeDTO.java

src/main/java/com/ic/er/bean/dto/EntityDTO.java

src/main/java/com/ic/er/bean/dto/RelationshipDTO.java

src/main/java/com/ic/er/bean/dto/ViewDTO.java

src/main/java/com/ic/er/bean/entity/Attribute.java

src/main/java/com/ic/er/bean/entity/Relationship.java

src/main/java/com/ic/er/bean/vo/.gitkeep

src/main/java/com/ic/er/bean/vo/AttributeVO.java

src/main/java/com/ic/er/bean/vo/EntityVO.java

src/main/java/com/ic/er/bean/vo/RelationshipVO.java

src/main/java/com/ic/er/bean/vo/ViewVO.java

src/main/java/com/ic/er/common/Cardinality.java

...ain/java/com/ic/er/common/CardinalityEnumTypeHandler.java

src/main/java/com/ic/er/common/DataType.java

src/main/java/com/ic/er/common/RelatedObjType.java

src/main/java/com/ic/er/common/RelationshipSerializer.java

src/main/java/com/ic/er/common/ResultState.java

src/main/java/com/ic/er/common/ResultStateCode.java