add v1.0 contexts

[lueck]

The new v1.0 contexts must be added.

Here is, what changed:

$ diff 1.0rc1.json v1.0.json 
3c3
<     "dts": "https://w3id.org/dts/api#",
---
>     "dts": "https://dtsapi.org/v1.0#",
69c69
< }
---
> }
\ No newline at end of file

[lueck]

Done in #36.