package version is more appropriate

>0.01pre-alpha

Well, this is technically a valid upstream_version, but :
- 01equals 1, so we should write 0.1pre-alpha instead of 0.01pre-alpha
- It's a good idea to use ~ instead of -, because - is allowed only if there's a debian_revision (there is currently, the -1), and ~ sorts before anything, even the empty part, so 1.0~prealpha is a lower version than 1.0 for debian. That's not true with -.
- qtox is not *that* buggy! I like my 1.0.