Allowing for AddDownPropagator option with EigCG and printing a warning message
Fixed a bug due to extra bracket in operator.c
allowing for random initial guess and two different tolerances in incremental eigcg
added a sample input for the incremental eigcg solver with the new parameters included
Allocating memory for eigenvalue computation only when nev>0. In addition, disable restarting cg if nev=0.
using %e instead of %f when prenting the tolerance in incr_eigcg.c
Merge branch 'master' of https://github.com/amabdelrehim/tmLQCD

Conflicts:
	operator.c