allow matrix creation beyond calloc limits

[Martin Albrecht]

For now, matrices are continuous memory as returned by a single malloc/calloc all. However, our rowswap structure allows us to use more than one calloc call, i.e. most of our code does not depend on continuous memory. We should -- at least optionally -- allow more than one calloc call to create the matrices in order to support truly big matrices.

[Martin Albrecht]

This is fixed in Wiki macro error: Changeset 267 not found.