adds some utility constructors to domain From,Join,Query,Select,Where

pom.xml

...ain/kotlin/unibz.cs.semint.kprime/domain/dql/Attribute.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/From.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/Join.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/Mapping.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/Query.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/Select.kt

src/main/kotlin/unibz.cs.semint.kprime/domain/dql/Where.kt

...bz.cs.semint.kprime/usecase/common/SQLizeCreateUseCase.kt

...bz.cs.semint.kprime/usecase/common/SQLizeSelectUseCase.kt

....cs.semint.kprime/usecase/common/UnSQLizeSelectUseCase.kt

src/test/kotlin/unibz.cs.semint.kprime/domain/MappingTest.kt

src/test/kotlin/unibz.cs.semint.kprime/domain/QueryTest.kt

...t.kprime/usecase/serialize/XMLDeserializerDatabaseTest.kt

...nt.kprime/usecase/serialize/XMLSerializerChangeSetTest.kt

...int.kprime/usecase/serialize/XMLSerializerDatabaseTest.kt