Load javascript code only when needed

This plugin is really nice, but there are two ‘issues’ that still prevents me from using it:

– It is loaded on every page, even ones without galleries. Usually, plugins like this are loaded only when needed.
– It loads 5 javascripts files, so it adds 5 http requests, that are really too many in my opinion. Couldn’t they be merged into one file only?

Thank you in advance, keep up the great job!

https://wordpress.org/plugins/photoswipe-masonry/