add contributions per chapter

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

chapter_adaptive/adaptive.tex

 \chapter{\emph{Adaptive}: parallel active learning of mathematical functions}
 \label{ch:adaptive}
 
-\blfootnote{My contribution to this work is developing and implementing a large fraction of the algorithms and the writing of the text.}
+\blfootnote{My contribution to this work is developing and implementing a large fraction of the adaptive sampling algorithms and the writing of the text.}
 %% Start the actual chapter on a new page.
 \newpage
 \noindent