add PGP section
Merge pull request #1 from LeSpocky/gnupg

add PGP section
slides: added some points to introduction
Merge https://github.com/netz39/cryptoparty

Conflicts:
	slides/index.html
Einführungsfolien
slides: added some pics and improved examples for surveillance
Merge branch 'master' of https://github.com/netz39/cryptoparty
beautified
slides: improved positions of example images
Merge branch 'master' of https://github.com/netz39/cryptoparty

Conflicts:
	slides/index.html
Section 4 übernommen
Merge branch 'master' of https://github.com/netz39/cryptoparty
Einführung/fazit: layout
Software, Password strength, Unterstützen
xkcd: password strength
feinschliff (formulierungen)
slides: minor theme change
Merge branch 'master' of https://github.com/netz39/cryptoparty
Tor
slides: added introductory xkcd and enhanced browser-plugin slide