Fix: keep-alive computed source still closed on context cleanup

Bugfix, don't depend on cheshire returning vector

Remove debug println

Test fix

Update changelog

Merge branch 'master' of github.com:tatut/ripley

New feature: events

Minor dev improvement

:keep-alive? true option for computed source

Add all HTML void elements to no-close-tag

Merge pull request #27 from tatut/boolean-attributes-fix

Fix rendering of standard boolean attributes

Merge pull request #26 from tatut/support-idiomorph

Support client side morphing library

Fix, close computed source when last listener unlistens