modalMor.m: Dominance analysis (Issue #24)
modalMor.m: Dominance analysis (Issue #24)

Dominance analysis:
- opts.dominance =0: default, no analysis
- opts.dominance = 'analyze': dominance analysis of all q eigenvalues
- opts.dominance = 'large': dominance analysis of 3*q eigenvalues (opts.type: SM/LM), reduction to q of those eigenvalues with largest dominance

Structure:
- new auxilary function 'dominanceAnalysis': directly after eigenvectors have been computed
   -> changes to a real or orthogonal system can be performed afterwards
- splitting of imaginary and real parts moved to auxilary functions -> function 'makeReal'

Eigenvector computation:
- if q>=n-1: eigs fails -> use eig
- eigs: complex conjugated eigenvalue: only computation of first left eigenvector necessary, because W(:,i+1)=conj(W(:,i))

MORLab/sssMOR