Added sleep and ultimate_question process to demo
Added sleep and ultimate_question process to demo

Adjusted some processes input/output getter/setter

tomkralidis/pywps,bird-house/PyWPS,jonas-eberle/pywps,SiggyF/pywps-4,ldesousa/PyWPS,geopython/pywps,jachym/PyWPS,ricardogsilva/PyWPS