Fix description of 1.2.0.
bugfix: ResultSet#getXXX(String) requires not columnName but columnLabel.

DefaultEntityOperator uses columnName from ResultSetMetadata to get
value from ResultSet.  Though ResultSet's get operation requires
columnLabel.
bugfix: NPE on Enum*ValueType.
Merge pull request #16 from dai0304/NPE_on_ValueType#isSupport_impl

bugfix: NPE on Enum...ValueType.
Merge pull request #15 from dai0304/use_getColumnLabel_instead_of_getColumnName

bugfix: ResultSet#getXXX(String) requires not columnName but columnLabel...