Clean summary

Don't know if anyone else will find this plugin useful.

I like summaries to have one feature image or thumbnail in archives and indexes. Currently if you have more than one image in the first 50 words (or whatever you have your default set to) They are all shown in the summary. This leads to some summaries being much larger in size than others.

At the moment the image is added to the beginning of the summary. It's also stored in the metadata of the article. It might be more versatile to not include the image at all and access it only through the metadata. Should I change it?