Bugfix: std::cout needs <iostream>
updated paper to discuss issues with twoloop Higgs corrections a little more and to describe a change I *propose* we make.
small edit to first sentence of introduction to address point 1 from referee 2.
Merge branch 'development' of https://github.com/FlexibleSUSY/FlexibleSUSY into development
Changed description of the two loop Higgs corrections in section 5 to match new plan which we agreed upon and Alex has implemented.  still need to fix later section.