let br tags create newlines; fixes issue #25 in grangier/python-goose

code mostly from https://github.com/ChorHizzle/python-goose/commit/e6b41bc267efaa9c79a1a214278bc56a44deeb7b
Merge pull request #27 from psilva261/handle_br

let br tags create newlines; fixes issue #25 in grangier/python-goose
useless code in StopWordsChinese class
StopWord class refactor
StopWord class refactor
typo