examples, api: use nice header
apigen: cleanup template
apigen: towards structured API
apigen: setgeom
apigen: material parameters
apigen: material parameters and units
apigen: neary everything categorized
api: fix figure borders
apigen: separate api-template.html and -api flag
remove duplicate exports like dwpos and ext_dwpos
apigen cleanup and tweaks
apigen: filter extensions
document initial magnetization
api mostly ready
rebuild complete API