Added code for project phase 4 part 1
Made minor updates to chunk
Updated repliers
Removed nlp directory
Add sudo sandwich replier

Replies to requests to make sandwiches as in the XKCD cartoon:
http://xkcd.com/149/

Unfortunately, a user will be unlikely to have the same conversation
with the bot as in the cartoon because the current Akka-based bot picks
among candidate replies randomly.
Merge pull request #15 from Tass/repl

added a "repl" to talk with the bot directly
Merge pull request #17 from njwilson/sudo-sandwich-replier

Add sudo sandwich replier
Merged Simon's solution to improving management of replies that don't come back from some repliers.
Merged Simon's pull request #16.
Made minor code changes
Fixed conflicts with merge
Merge pull request #18 from spryor/PP4

PP4
Added Thats what she sad replier to tshrdlu

Remove unwanted files

Made a small chang, added TWSS replier
Merge pull request #19 from treadstone90/upstream

Added Thats what she sad replier to tshrdlu
Added import in code. Was causing issues
Add GeoNames jar for location info

I could find a repository with anything close to a recent version of
GeoNames in it, so I downloaded the .jar myself along with its
dependency, jdom.
Add LocationResolver actor and friends
Merge pull request #20 from treadstone90/upstream

Added import in code. Was causing issues
Merge pull request #21 from njwilson/location-resolver

New actor to resolve the location of tweets
improved the repl help message