"Hot summer" edition 2019
- The datatype ('dtype') property is now an optional property for text
elements. Only when the dtype property is specified at the creation of a
text element, will the dtype property be written to the gds file.
- updated @gds_element/display.m to display the data type property
of a text element.
- the datatype property for text elements was not handled correctly
in 'set_element_data.c'
- better formatting of help text for gdsii_cdfeature.