minor: remove chekcstyle clone and wercker is using 'local-checkstyle'
minor: remove chekcstyle clone and wercker is using 'local-checkstyle'

rnveach/contribution,checkstyle/contribution,checkstyle/contribution,checkstyle/contribution,checkstyle/contribution,rnveach/contribution,checkstyle/contribution,rnveach/contribution,checkstyle/contribution,rnveach/contribution,rnveach/contribution,rnveach/contribution,checkstyle/contribution,rnveach/contribution