add contributions per chapter

@anton-akhmerov, could you provide some feedback on these changes?

chapter_spinorbit/spinorbit.tex

@@ -4,7 +4,7 @@
 \blfootnote{This chapter has been previously published as
 Jouri D. S. Bommer, Hao Zhang, {\"O}nder G{\"u}l, Bas Nijholt, Michael Wimmer, Filipp N. Rybakov, Julien Garaud, Donjan Rodic, Egor Babaev, Matthias Troyer, Diana Car, S{\'e}bastien R. Plissard, Erik P. A. M. Bakkers, Kenji Watanabe, Takashi Taniguchi, Leo P. Kouwenhoven, \textit{Spin-orbit protection of induced superconductivity in Majorana nanowires}, \href{https://doi.org/10.1103/PhysRevLett.122.187702}{Phys. Rev. Lett. \textbf{122}, 187702, (2019)}
 }
-\blfootnote{My contributions to this work are developing and implementing the numerical methods used in the tight-binding calculations and performing the simulations that calculate the conductance.}
+\blfootnote{My contributions to this work are developing and implementing the numerical methods used in the tight-binding calculations, performing the simulations that calculate the conductance, as well as writing about them.}
 
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 \newpage