Fixed libqt5xdgiconloader-dev.install
Reworked descriptions in debian/control to prevent lintian whining
Fixed symbols version
Fixed copyright for xdgiconloader
Fixed package descrioptions
Introduced the new package libqt5xdgiconloader1
Bumped standards to 3.9.8, no changes needed
Symbols sorted and unified
Bump years in copyright
Added hardening=+all
Added README.md to debian/docs
set CMAKE_BUILD_TYPE=RelWithDebInfo