Added 'make dist' target
Removed *.dirs

Per Debian docs, *.install files should be enough.
Added bosp.menu
Added bosp.docs
Reformating some files using templates generated by debmake

debmake --binaryspec "bosp:bin,liboskoengine0:lib,liboskoengine0-dev:dev,liboskoengine0-dbg:dbg" -j -x4
Added default maintainer scripts generated by debmake
Added libsokoengine0-dbg package.
Added correct dependencies to -dev package.
Added debian/watch from debmake generated template.
Removed CMake install(EXPORT...)

There has to be better way to export CMake package than maintaining
sokoengine-config.cmake which unmodified works only for non-multiarch
installations.
Added multiarch support to Debian package.
Override override_dh_auto_test until problems with it are resolved.
Fixing some of linthian warnings
Merge branch 'feature/improve_debian_package' into development

Refined Debian package configuration solving more issues with
Debian packaging. This is still not complete, but it is a step
forward.