remove dinactive command since it isn't used by anybody

to reduce complexity.. also inactive is currently not used
by anybody too :/
python3 fixes + minor fixes
big rewrite: project structure, python3, translation

created src directory and moved some files into it (mostly those, which should not be directly called)
make some code work with python3
create language .ini files since this seems to be easier to maintain
        the idea and some code for it comes from kovans-ogbot