Change consistent initialization from pure Newton to pseudo transient continuation approach

[jbreue16]

PTC is expected to be more robust and hence mitigate consistent initialization issues.

[schmoelder]

Excellent idea!

Note, that @sleweke already provided a PTC implementation in CADET-Process that I use to pre-process some complex scenarios.

[jbreue16]

This should also fix some tests that currently fail: Consistent initialization for SMA binding and all chromatography models (LRM + LRMP + GRM + GRM2D)