To install:
1. Just download the "imagesloaded" Library from here https://github.com/desandro/imagesloaded.git
2. Upload the files to sites/all/libraries/jquery.imagesloaded folder
3. Rename "imagesloaded.js" to "jquery.imagesloaded.js" in sites/all/libraries/jquery.imagesloaded folder
4. Flush your cache. Problem will resolve.