1.6.0

This changes break backward compatibility with version 1.5 in remove and removeAll method

• [klgd] Fixed conflict when project using also jQuery 2.*
• [RomanBurunkov] Moved effect and time parameter in remove method to config option.
• [RomanBurunkov] Added callback in methods remove and removeAll as a parameter
• [RomanKhomyshynets] Fixed add function with non-leaf parent_id, fixed #84