.gitignore updated

	modified:   .gitignore
latest changes, new figures, more content

	renamed:    resources/images/basic_types.png -> figures/basic_types.png
	renamed:    resources/images/combination.png -> figures/combination.png
	modified:   mainmatter/chapter1.tex
	modified:   mainmatter/chapter3.tex
	modified:   mainmatter/chapter4.tex
Updated latest version of thesis.pdf
	modified:   thesis.pdf