Merge pull request #336 from garrettr/feature/remove-after-request

Don't set "no cache" headers in Flask
sources that don't submit documents are 'pending' and don't get displayed by default. fixes #302
added comment to explain what pending is
added micahflee/securedrop-torrc files into repo (#282)
making torrc.additions file hidden
wrote tails-torrc install script
updated tails-torrc readme
updated tails-torrc readme
new update_torrc binary, slightly modified source code
made tails-torrc instructions simpler
Updated installation documentation to include much simpler instructions for using Tails to access the Document Interface. Also split the instructions for setting up Tails USB sticks onto a separate page, and made it rely more heavily on docs from the Tails website. Change the GPG key generation instructions to make a passphrase-less key (setting a passphrase in this case offers negligible security).
Renamed tails_config.me to .md
Typo in Tails config docs
fixed typos in install docs
Fix incorrect setup of SECUREDROP_ROOT
Temporarily disable file upload test per #345
Merge branch 'develop' of https://github.com/freedomofpress/securedrop into pending-source
Made "delete collection" and "delete selected" tests submit a message after creating a codename. This way the sources aren't pending.
Merge pull request #343 from micahflee/pending-source

Pending sources
removed update_torrc binary, and include compiling in the install script (#346)