Improve CKAN submissions
Improve CKAN submissions

- Skip submission if already present.
- Directly write license into `.netkan` file.
- Tag metadata as automatically generated.

toadicus/KerbalStuff,EIREXE/SpaceDock,EIREXE/SpaceDock,KerbalStuff/KerbalStuff,Kerbas-ad-astra/KerbalStuff,EIREXE/SpaceDock,KerbalStuff/KerbalStuff,ModulousSmash/Modulous,ModulousSmash/Modulous,Kerbas-ad-astra/KerbalStuff,ModulousSmash/Modulous,ModulousSmash/Modulous,Kerbas-ad-astra/KerbalStuff,toadicus/KerbalStuff,KerbalStuff/KerbalStuff,toadicus/KerbalStuff,EIREXE/SpaceDock