matt-graham/mici: v0.1.3

Minor release with improvements to non-linear equation solvers, additional block diagonal matrix classes and fix to bug when monitoring boolean chain statistics. Non-linear equation solvers, including solvers for projection on to manifold for constrained systems, all now implement a test for the change in the position vector between iterations being less than a tolerance as well as the tolerance on the non-linear equation being satisfied. For the projection solvers, controlling the position error in addition to the constraint error helps reduce the probability of spurious detections of non-reversible steps due to positions not converging to within the reverse check tolerance. Matrix classes corresponding to square block diagonal matrices added, allowing for example efficient use of metric matrix representations with such structure. Bug in update of running mean of monitored chain statistics due to assumption of floating point values fixed by casting all values to floats prior to computing update