Updating thesis. More corrections and content added.

	modified:   2-thesis/src/abstract.tex
	modified:   2-thesis/src/conclusion.tex
	modified:   2-thesis/src/evaluation.tex
	modified:   2-thesis/src/formalization.tex
	modified:   2-thesis/src/introduction.tex
	modified:   2-thesis/src/soa_p2p_trust.tex
	modified:   2-thesis/src/system.tex
	modified:   2-thesis/src/validation.tex
	modified:   img/sign_up.eps
	modified:   img/sign_up.graphml
	new file:   plots/account_registration_messages.png
	new file:   plots/logout_messages.png
	new file:   plots/password_change_messages.png
	new file:   plots/plot.py
	new file:   plots/private_key_recovery_a_messages.png
	new file:   plots/secure_routing_messages.png
	new file:   plots/sign_in_messages.png