added sample code for include() function and the extended syntax got get options in subsections
added sample code for include() function and the extended syntax got get options in subsections

peda-r/libconfuse,westermo/libconfuse,martinh/libconfuse,martinh/libconfuse,troglobit/libconfuse,troglobit/libconfuse,westermo/libconfuse,peda-r/libconfuse