Update/proofread Okular docbooks to kf5

remove entities kappname, package, PDF - unused or already defined in kdoctools
bum date + releaseinfo - is version 1.0 correct for 16.12?
add missing shortcuts
add 'Drawing Tool Configuration'
remove appendix installation
update man page - remove kde4 options + add qt5options+kf5options
REVIEW:129326