Add a unique secret token to install instructions

Failing to do so means that if you have multiple stringer installs on the same host, one password will grant you access to all of them.
Bump feedjira and loofah versions
Replace unprintable unicode character workaround with new loofah scrubber
Remove WIP
Add Victor to contact section
Update README.md
Update README.md
Use openssl for the random token
Merge pull request #311 from zigdon/patch-1

Add a unique secret token to install instructions