updated ubuntu install guide to use 2 servers
Changing HACKING.md to simplify and update
added rudimentary support for theming. fixes #67

Conflicts:
	securedrop/example_config.py
add support for theming to journalist interface too (#67)
delete obsolete documentation files
remove misc. refs to deaddrop
remove refs. to deaddrop, rewrite for newest config defaults, and reformat
remove ref to deaddrop, and fake email from uid

Since the reference to deaddrop was part of the fake email address, it made
sense to remove them both since the fake email was not actually needed.
I modified getkey so it should still work, even if used with reply keypairs
generated with previous versions of securedrop (they'll still have the
hashed codename in their uid).
update application README
add download link for journalist pubkey, started info page
add "why?" page for downloading pubkey

Quick explanation of why you might want to download the public key.

Has some instructions for sources to encrypt their own submissions (linux/mac
only, assumes you can use the command line).
Merge branch 'theming' of https://github.com/micahflee/securedrop into micahflee-theming
little fixes for custom header image merge

* rename variables to be more descriptive
* use getattr so you don't have to have CUSTOM_HEADER_IMAGE defined in
config.py (so old config files will still work)
* remove some trailing whitespace
remove deaddrop reference from test/development keys

The uid now references Securedrop and has a better warning message ("DO NOT USE
IN PRODUCTION" instead of "DO NOT USE", which was kind of hypocritical). The
fingerprint has not changed.
Merge pull request #174 from garrettr/feature/64/internal-naming-to-securedrop

Feature/64/internal naming to securedrop closes #64
Merge pull request #177 from garrettr/feature/142/journalist-pubkey

Feature/142/journalist pubkey closes #142
Merge remote-tracking branch 'upstream/master'