Remove empty lines and blank spaces
Fix indentation
Remove local variable url from core since it is not used
Fix multiple preview request at the same time
Extract core functionality into an object
Fix indentation
New Feature: Show preview for a given link
Remove unused local variable preview from core
Add Feature: Set config based on template
Refactor: Rename container variable to target
Initializa variables in core object
Add a toggle to use html decoding on title and description
Add documentation and examples
Change the way in which the preview is cleaned
Add a proxy option for loading images