Update VOTable spec to 1.3

[MatthewWhiting]

From ASKAP ticket 5729:

Hi Ben,

I’m writing a simple reader to load the VO Table XML files and I’m trying to use schema driven 
parsers to do it, however I’ve run into a small issue and James pointed me your way.

The issue is that the namespaces on the selavy-fitResults.xml and selavy-fitResults_full.xml  
files are:

<VOTABLE version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:noNamespaceSchemaLocation="http://www.ivoa.net/xml/VOTable/VOTable/v1.1">

However, they should be something like this (which avoids the use of a ns prefix):

<VOTABLE version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://www.ivoa.net/xml/VOTable/v1.1" 
    xsi:schemaLocation="http://www.ivoa.net/xml/VOTable/VOTable/v1.1">

The differences are highlighted in bold and I’ve verified the second form does pass my unit tests.

Is this a change that you can make?

Cheers,
Simon

And Ben notes in the ticket:

Looking at the IVOA standards Duchamp implements 1.1, where the change Simon asks for seems to be consistent with the 1.3 standard. The following document specifies VOTable 1.3: http://www.ivoa.net/documents/VOTable/20130920/

Its time to update Duchamp to conform to VOTable 1.3 I guess.

Do this for the next release so we can incorporate into Selavy pronto.

[MatthewWhiting]

That link again: ​http://www.ivoa.net/documents/VOTable/20130920/

[MatthewWhiting]

NB - closely related to #86.

[MatthewWhiting]

The version was updated in [1299] and [1301]. This can close this ticket, but we still have #86 outstanding, as the STC model needs to be fixed for VOTable 1.3.