catch IO exceptions from broken downstream pipe
added test for pipe-cutoff behavior
Merge pull request #19 from jeffakolb/master

a title
keypath addition
updated keypath
keypath code refactor
keypath minor edit
Merge pull request #21 from blehman/master

keypath code refactor
Updates to tests and Brian's additions
Fixed secion on twitter_entities for urls
Fixed the explain for links
Added newsgator json basic options.