fix configure override, update depends, headers removal, fix typos, parse cflags, explain and clean rules

update requeriments, for cmake due issue #632, ...nes for packagers and fixed typos

update headers and lib install, due razorqxt lib removal,

i override configure rule for older without multiarch and only in newer will have multiarch

also debhelper 9 now set as default multiarch paths

i'll explain changes and rules in file, fix the parse cflags in all cases and set manually due don let debhelper set 

https://groups.google.com/d/msg/razor-qt/bNkfYAbCy0E/DDup_IzwNL0J