Refactor the way shows and sequences are saved

[theeldestelder]

Currently, loading into a full show takes a large amount of time because the files themselves total almost a gigabyte of text files. This is pretty large for what we do.

Figure out a way to reduce this size and implement it.

Also, sequence metadata and actual sequence data is saved in the same file so accessing the metadata means reading the entire large file into memory. Separate these files so if only the metadata is required, only the metadata file is loaded. Alternatively, figure out a way to only load the metadata portion of the file