rust-numpy v0.10.0

I want to note that there are two important changes in this version. One is that rust-numpy works on stable Rust as per PyO3 0.11, and the other is PyReadonlyArray.
To prevent undefined behavior, PyArray::as_slice and families are unsafe now. Please use the safe PyReadonlyArray::as_slice instead.

• Remove ErrorKind and introduce some concrete error types
• PyArray::as_slice, PyArray::as_slice_mut, PyArray::as_array, and PyArray::as_array_mut is now unsafe.
• Introduce PyArray::as_cell_slice, PyArray::to_vec, and PyArray::to_owned_array
• Rename TypeNum trait Element, and NpyDataType DataType

rust-numpy v0.9.0

• Update PyO3 to 0.10.0

rust-numpy v0.8.0

• Update PyO3 to 0.9.0
• Fix SliceBox initialization

rust-numpy v0.7.0

• Update pyo3 to 0.8

rust-numpy v0.6.0

• Update PyO3 to 0.7
• Drop Python2 support