Breaking changes for next version

[bluss]

strikeout: it was decided to skip this

• Remove deprecated ndarray::blas in favour of ndarray_rblas crate
• Add Send + Sync to LinalgScalar
• Consider AsPrim for NdFloat
• Remove deprecations: free function zeros, type alias Array, .raw_data(), .fold()
• Remove iadd, imul etc as deprecated too, in favour of += etc
• .swap_axes() should use Axes arguments!
• Restrict .map() to Fn() closures for now.
• consuming neg and not should not be defined for arrayviewmut nor consuming lhs scalar operations
• Require Zero or LinalgScalar in .sum()