Update / remove entries in tools list

[t-sommer]

• FMI Target for Simulink Coder: website does not exist any more
• FMU SDK: no longer maintained
• IGNITE: seem to be https://www.realis-simulation.com/products/ignite/ now
• ISG-virtuos: new website https://www.isg-stuttgart.de/produkte/softwareprodukte/isg-virtuos
• JFMI: last update April 28, 2013
• Ansys Motion: links to Korean website
• NeurEco: 404

TBC...

[chrbertsch]

FMI Target for Simulink Coder: @TorstenBlochwitz : can we remove this?
FMU SDK: it is still out and used, would keep it
IGNITE: I contacted Realis
ISG Virtuos: I contacted ISG
Ansys Motion: @chrpetre: could you please take care
Neureco: Link works for me

[chrpetre]

@chrbertsch thanks for noticing me - I have opened #595 to fix it, can you please review/approve (or let me know if anything needs to be adapted) ?

[chrbertsch]

We should

• define criteria when to remove a tool from the list
• provide a reason for each removal proposal
• give the tool vendors/prividers a chance to comment and/or update their entries before removal