fix id so destroy shows up in the navigation

currently, pipe was linked twice, but destroy wasn't
ensure that there are no duplicate ids
Merge pull request #61 from c089/fix-link-to-destroy

fix id so destroy shows up in the navigation
Merge pull request #62 from c089/ensure-no-duplicate-ids-in-docs

ensure that there are no duplicate ids
rebulid dist and docs
solving caolan/highland/issues/60
* optional wrapping for arguments an event emitter may pass to the event handler