Upgrade Jackson to Jackson2

I added the jackson 2.4 databind jar to the pom file of stormcrawler.
I changed the JsonNode of the ParseFilter interface
to use Jackson 2 instead of using jackson1. This required a change
of multiple classes in StormCrawler which implement the ParseFilter
interface. I did this because we want to use jackson 2 everywhere
in our monitoring project. I kept the old jackson 1.9.3 jar for backwards
compatability, I did not know if you wanted me to change everything
from jackson 1 to jackson 2 so I just upgraded the necessary classes
to make this work.

I tested this by running mvn clean package to create the jar then running the storm jar as was the instructions on the git page
https://github.com/nfalaki/storm-crawler