Updating thesis

	modified:   2-thesis/src/soa_p2p.tex
	modified:   2-thesis/src/system.tex
	modified:   2-thesis/thesis.tex
	new file:   img/Register user.png
	new file:   img/Register user.pxd
	new file:   img/Register user.xcf
	new file:   img/User-Computer-Green.png
	new file:   img/User.png
	new file:   img/key-icon.png
	new file:   img/key-icon_grey.png
	new file:   img/open-padlock.jpg
	new file:   img/padlock-icon.png
	new file:   img/padlock-icon.xcf
	new file:   img/padlock-md.png
	new file:   img/padlock-unlocked.jpg
	new file:   img/padlock.jpg
	new file:   img/padlock.png
	new file:   img/padlock.svg
	new file:   img/padlock_SK_keystore.png
	new file:   img/user_registration.png