outdims: revise implementation for Chain, dimension check for Dense #1252
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This PR reflects the discussion in #1086.
outdims(c::Chain, isize)
calculated the layers in the wrong order.The function has been replaced by a performance optimised version following the same idea.
outdims(c::Dense, isize)
now throws an error if dimensions do not match.One test, which now throws an error, has been adapted, more tests have been added.
I will setup another PR for further improvements of outdims, as discussed in the corresponding issue.