Merge pull request #27 from burntout/master

Fix some minor typo, and clarify that no keying material is held persistently on server
update faq to reflect what a duress key provides
Merge branch 'master' of github.com:atoponce/d-note
s/teh/the/g
clarify AES
change to the Affero General Public License v3
change to the Affero General Public License v3
fix typo
update about.html to show agpl license
s/zen/duress_text/g
some markdown improvements
fix broken tooltip hover
add apt-get command for installing python-pbkdf2
Update browser fingerprint JavaScript

Use minimized javascript 'fingerprint-min.js' and remove the larger javascript
file. Update the index.html template to point to the minimized file.
fix typo
clarify some of the python documentation