Upgrade of " TimeSeries serialization. A proposal using utypes" slides

[François Bonnarel]

Dear all,

      I upgraded the slides I presented at recent interop during the 
TDIG/DAL/DM/Apps common session. The slide now include screenshots of 
the demonstration of examples within Topcat.

http://wiki.ivoa.net/internal/IVOA/InterOpMay2018TDIG/TS-Serialization-utype.pdf

Cheers

François