R55 – Start of the API3 builds

Starting from today there will separate builds of the new audio branch (master) and the old (api3) branch provided for those who need full compatibility with old scripts.

The biggest fixes in this release is that the handling of pow in expr has been fixed and no longer produces unexpected output. There’s also a new vsrepo included that once again works. That’s about it. It’s the life of a maintenance branch where only super serious things will be fixed.