Merge pull request #74 from gitnasty/ajaxify_comment_rendering_based_on_zoomIn_bind

Ajaxify comment rendering based on zoom in bind
Merge branch 'master' of https://github.com/cicadas-2014/percolator into ajaxify_comment_rendering_based_on_zoomIn_bind
modify commentHTML loop append to accomodate the non-double-nested json object(concurrent fix) in comments_controller
remove double-nested json object