Feature Request: Search pre-set list of seeds

[Red3Tango]

Have ability to search a list of seeds from a text file. Instead of Random or just Specific Range.

Would like to be able to find a certain (small) set of biomes at one range, getting a very large list. Then the ability to use that list as the seed parameter for searching to narrow the list down based on different search parameters.

Example: Search for seeds that have Mooshroom Island within 100 blocks, then take those results and find ones that also have a Forest within 2000 blocks.