Small fixes

warning: expression with side effects will be evaluated despite being used as an operand to 'typeid' [-Wpotentially-evaluated-expression]

Staggered scheme for the coupled processes

base class

added more documentations about the staggered scheme

 for the staggered scheme.

coupled terms.

Fixing eigen alignment

This fixes build errors when node modules were updated.
It should not be costly as yarn caches downloads.

entries.

This adds subsection support.