Add Competence center for geoinformation of the Kanton Solothurn

[WebSnke]

Thanks for the contribution! Below is a template that can make it easier when submitting your Organization:

Your Organization: Competence center for geoinformation of the Kanton Solothurn
GitHub Organization url: @sogis
Country/Locality: Switzerland Link: http://agi.so.ch/

Inclusion requirements:

• [x] Referenced account is an Organization not a User^
• [x] If this is a government project, your Organization's description should include a reference to your country/agency.
• [x] Make sure your Organization includes at least one public repository
• [x] Please also include a URL for your organization that links back to your organization or agency homepage.

:heart: GitHub Government Contributors

[WebSnke]

@mlinksva Could you take a look at my pull requests and merge them?