Adding screencast script

Watches for screencast links and posts the images from the main page.
Optional filter for jenkins list
Merge pull request #712 from shanestillwell/jenkins-filter-list

Optional filter for jenkins list
Initial pass at a postgres brain
Merge pull request #713 from danthompson/pg_brain

Add postgres brain
Merge pull request #591 from chrismlarson/master

Adding a script for posting screencast images when a screencast.com link is posted in a room.
Fix formatting errors

Many dashes were switched with underscores (and vice-versa). Cleaning them up as I find them.
Merge pull request #714 from tessa-lt/patch-1

Fix formatting errors
Adds a Clippy meme to the meme generator, which
listens for "it looks like you('re) <text>"

```
Hubot> hubot it looks like you're trying to use Hubot
Hubot> http://images.memegenerator.net/instances/33587375.jpg 
```

(Thanks to @jasonkarns for the suggestion)
Merge pull request #716 from searls/master

Add a Clippy meme to the meme_generator script.
S3 brain resets brain auto-save interval

- Outsmarted myself using a separate timer for the S3 brain, as this
prevents it from responding to regular .save() calls
- Added environment variable HUBOT_S3_BRAIN_SAVE_INTERVAL, which
defaults to 30 minutes
- Improved docs
Merge pull request #715 from Iristyle/s3-mods

Fixes for S3 brain saving
brb - natural availability tracking
Hubot, be polite and say hello
Merge pull request #719 from marioBonales/master

Hubot, be polite and say hello!
Revert the redis-brain change, it broke scripts
Merge branch 'master' of github.com:github/hubot-scripts
Merge pull request #717 from jmhobbs/master

Natural availability tracking with "brb"
Added filmwise command to guess answer
Merge pull request #720 from mwongatemma/master

Added filmwise command to guess answer