chrome popup signing fix. closes #44

Decided to leave sign in active in popup.  Required adding back in sign
in and sign out button to popup.html and fixing auth documentation to
note that you must add prod_signin.js in place of signin.js if using
auth.
Added the kafka producer for writing to the google search topology
version number to 0.5_testing
change plugin version numbers - can't contain strings
Made the Firefox Tab Page look like Tors
Merge pull request #45 from Sotera/fix-on-off-firefox

Made the Firefox Tab Page look like Tors
Merge branch 'v0.5' of https://github.com/Sotera/Datawake into v0.5
fix active tab query. closes #46
add user id to mock auth
Added the Kafka Write when adding a trail entity
Added appid checking to the lookahead kafka spout to make sure it wasn't emitting messages that were not intended for it
Merge pull request #48 from Sotera/crawler-fix

This adds appid checking to the lookahead spout.
Merge remote-tracking branch 'origin/v0.5' into trail-selections
Added the trail based search to the Chrome Extension