Update test suite info
Update test suite info

- add AppVeyor
- running full test suite is no longer mandatory, now that the full test is run on the CI servers
- trim instructions
ljo/exist,windauer/exist,dizzzz/exist,wolfgangmm/exist,ljo/exist,wolfgangmm/exist,ambs/exist,RemiKoutcherawy/exist,hungerburg/exist,eXist-db/exist,windauer/exist,adamretter/exist,olvidalo/exist,lcahlander/exist,lcahlander/exist,hungerburg/exist,ljo/exist,eXist-db/exist,eXist-db/exist,wolfgangmm/exist,opax/exist,hungerburg/exist,opax/exist,eXist-db/exist,hungerburg/exist,lcahlander/exist,RemiKoutcherawy/exist,ambs/exist,olvidalo/exist,RemiKoutcherawy/exist,wolfgangmm/exist,wolfgangmm/exist,adamretter/exist,ambs/exist,eXist-db/exist,dizzzz/exist,RemiKoutcherawy/exist,ljo/exist,olvidalo/exist,ambs/exist,ljo/exist,dizzzz/exist,opax/exist,adamretter/exist,RemiKoutcherawy/exist,opax/exist,lcahlander/exist,windauer/exist,dizzzz/exist,ambs/exist,adamretter/exist,dizzzz/exist,windauer/exist,eXist-db/exist,olvidalo/exist,ljo/exist,opax/exist,olvidalo/exist,adamretter/exist,lcahlander/exist,windauer/exist,dizzzz/exist,RemiKoutcherawy/exist,windauer/exist,lcahlander/exist,ambs/exist,adamretter/exist,hungerburg/exist,wolfgangmm/exist