(Quick re-upload, because in 1.12.2-v1 signs did not work for float-rails)

This new version adds support for custom block types to use as hang rail instead of just the iron bars. In addition, for each custom block type specified, it is now possible to specify the offset of the minecart relative to the block. This also allows positive offsets to have the minecart float above the rails block.

Included are various fixes that have both hanging and floating in mind, to allow for proper movement through the air in both cases. In particular, it fixes some problems people had with float rail where the minecart skimped too close to the block when moving over a slope.

The main page has been updated with the config.yml specifications for all of this.