Algorithm overview and tests

[JensHahne]

Hi @tlunet

I think it would be important to have a "verified" block iterations, such that changes in the code can also be tested on algorithm view. Therefore, i created a test file 'test_blockMethods`.

Currently tested blockIterations:

Method	Formulation	Predictor
Parareal	$\phi$ $\chi$
Parareal	$\phi$ $\chi$	$\phi_D^{-1}*\chi$
Parareal	$F$ $G$
Parareal	$F$ $G$	$G$
PararealSC	$F$ $G$	None
PararealSC	$F$ $G$	$P * G * R$
BlockJacobi	$\phi$ $\chi$	I
BlockJacobi	$\phi$ $\chi$
BlockJacobi	$\phi$ $\chi$	$\phi_D^{-1}*\chi$
ApproxBlockGaussSeidel	$\phi$ $\chi$
ApproxBlockGaussSeidel	$\phi$ $\chi$	$\phi_D^{-1}*\chi$
PFASST	$\phi$ $\chi$

Needs to be added:

Method	Formulation	Predictor

Following todos:

1. Verify that the block iterations look like expected
2. Update the list for not considered variations
3. Use all variations of getBlockIteration