Merge branch 'tw_basic_service' into 'master'

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

src/main/java/com/ic/er/config/.gitkeep

src/main/java/com/ic/er/dao/AttributeMapper.java

src/main/java/com/ic/er/dao/EntityMapper.java

src/main/java/com/ic/er/dao/LayoutInfoMapper.java

src/main/java/com/ic/er/dao/RelationshipMapper.java

src/main/java/com/ic/er/dao/SchemaMapper.java

src/main/java/com/ic/er/dao/ViewMapper.java

src/main/java/com/ic/er/entity/AttributeDO.java

src/main/java/com/ic/er/entity/EntityDO.java

src/main/java/com/ic/er/entity/LayoutInfoDO.java

src/main/java/com/ic/er/entity/RelationshipDO.java

src/main/java/com/ic/er/entity/SchemaDO.java

src/main/java/com/ic/er/exception/ERException.java

src/main/java/com/ic/er/service/AttributeService.java

src/main/java/com/ic/er/service/EntityService.java

src/main/java/com/ic/er/service/RelationshipService.java

src/main/java/com/ic/er/service/ViewService.java

src/main/java/com/ic/er/service/serviceImpl/.gitkeep

src/main/java/com/ic/er/util/.gitkeep