Fix error 131 with Acrobat Reader.

Adobe Acrobat Reader could not read the document and reported:
"There was a problem reading this document (131)".
Now it has been fixed. More information at:
https://tex.stackexchange.com/questions/64448/how-to-overcome-acrobat-reader-error-131-with-a-pdflatex-doc
Fix mistakes. Now the thesis is ready!