The new functions work with a new `PaddedRFFTArray` type.
They also work with appropriately sized Compex Arrays and Real Subarrays.

…ed to solve ambiguity.

Same for `brfft!(f::PaddedRFFTArray, i::Integer)`

The transformation was not really in-place.

…exOrRealReinterpretArray`

…rrays.

- `PaddedRFFTArray` now accepts any `AbstractArray` type, provided the strides are continuous.

- Changed some variable names to be consistent with other functions (`d` is always the length of the first dimension of the logical real array)