This PR adds support for multiplayer charts, and adds a new multiplayer
TJA/fumen combo for testing.
This PR is quite small, because the only work that needed to be done is
parsing the course metadata. Once the TJA lines are split into courses,
the actual course-by-course parsing logic is identical to the songs that
came before.
Fixes#6.
This PR adds the remaining changes needed to support branching TJA
songs.
- Properly handling `r` (drumroll) based branching conditions
- Handling commands that come after a measure end but _before_ the first
`#BRANCHSTART` command. (This was not previously covered by
`hol6po.tja`.)
As well, it adds a bit of cleanup/refactoring to the changes from the
previous branch PR (#20).
To test these changes, another new branching TJA-fumen pair is added to
the test suite.
The official fumen had some issues where a note ended up in the wrong measure:
- Expected: pos 0.0 on the next measure
- Actual: pos 645 on the prev measure (impossible pos)
They're the same pos, but only pos 0.0 is possible to express in TJA charts, so the fumens themselves had to be updated.
Also, the TJA chart had errors, too:
- The BPMs/SCROLLs in the BPMCHANGE section were incorrect
- Some drumrolls were too short
Fixing these errors caused the failing test to pass.
