Nonintrusive Galerkin can now also do BFGS
Added comparison with bfgs-nonintrusive
underline can now also center the text
lbfgs_solve: comments and unittest
Merge branch 'master' of github.com:ezander/sglib-testing

Conflicts:
	sglib/solver/lbfgs_solve.m
	sglib/solver/unittest_lbfgs_solve.m
Cleaned up some mess left over from the previous merge (in lbfgs_solve)