docs: fix homepage link (pykeio#508)

fix: use absolute paths for crate `include`

2.0.0-rc.9

docs: switch rustdoc links back to docs.rs

2.0.0-rc.6

2.0.0-rc.5

2.0.0-rc.4

2.0.0-rc.3

2.0.0-rc.2

2.0.0-rc.1