Update to Jackson 2.8.1
Update to Jackson 2.8.1

Closes #216.

kneubi/fscrawler,dadoonet/fscrawler,dadoonet/fscrawler,dadoonet/fscrawler,dadoonet/fsriver,kneubi/fscrawler,dadoonet/fsriver,dadoonet/fsriver,kneubi/fscrawler