Updating respond.js

Sources: https://github.com/scottjehl/Respond/archive/v1.4.2.zip
https://github.com/scottjehl/Respond/archive/1.4.1.zip
https://github.com/scottjehl/Respond/archive/1.4.0.zip
Updating jplayer

Sources: https://github.com/happyworm/jPlayer/archive/2.5.3.zip
https://github.com/happyworm/jPlayer/archive/2.5.2.zip
https://github.com/happyworm/jPlayer/archive/2.5.1.zip
Merge pull request #2393 from petecooper/master

Updating respond.js