Create jquery.colorbox-fr.js

French translation
Merge pull request #324 from oaubert/patch-1

Create jquery.colorbox-fr.js
Minor positioning fix
Create jquery.colorbox-da.js
Merge pull request #325 from danieljuhl/patch-1

Create jquery.colorbox-da.js
Add Czech (cs) translation
Merge pull request #326 from fosil/master

Add Czech (cs) translation
Create jquery.colorbox-es.js

Created Spanish translation.
Merge pull request #330 from migolo/patch-1

Spanish translation
Fixes 331 - better checking of image urls when preloading
This should enable iframe scrolling in iOS devices (Fixes 41)
Added retina display properties: retinaImages, retinaUrls, retinaSuffix
Fixed iframe scrolling on iOS devices.
Use singular names for properties
Updated manifest so that plugins.jquery.com downloads from github.
Updated manifest for jquery.plugins.com
Add slideshowStart/Stop translations