Removed useless println.
Add weightlog.
First stabs at dispatching arguments for the jar.

lein uberjar to compile, cd to target/uberjar, and then run a
command, like this:

java -jar keepintouch-0.1.0-SNAPSHOT-standalone.jar
/home/michael/Dropbox/keepintouch.data weight

Currently, providing a weight like 0.13 won't work from the jar...