Some performance optimization (moved some methods to ptototype chain)

Some performance optimization (moved some methods to ptototype chain)

-------------f This line and the following will be ignored --------------

modified:
  telemeta/htdocs/js/application.js
  telemeta/htdocs/js/locale.js
  telemeta/htdocs/timeside/src/playlist.js
  telemeta/htdocs/timeside/src/rulermarker.js
  telemeta/htdocs/timeside/src/timeside.js
  telemeta/templates/telemeta_default/home.html
  telemeta/templates/telemeta_default/mediaitem_detail.html
unknown:
  telemeta/htdocs/js/soundmanager2-jsmin.js
  telemeta/htdocs/js/soundmanager2-nodebug.js
  telemeta/htdocs/swf/soundmanager2_debug.swf
  telemeta/htdocs/swf/soundmanager2_flash9_debug.swf
  telemeta/htdocs/timeside/skins/lab/img/empty.png