Initial support for discid_get_toc_string

discid_get_toc_string will properly appear in libdiscid 0.6.0. For older
versions of libdiscid the TOC string will be extracted from the submission URL.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
Merge branch 'master' into feature/toc

Conflicts:
	libdiscid/_discid.pyx
Add toc to libdiscid.DiscId

Also handle the extraction of TOC string from the submission URL there.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
Packages for Arch are available

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
Merge branch 'feature/toc'
Add test for sectors_to_seconds

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
Release 0.4

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
Fix typo in test_read_not_implemented test

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>