cooltools eigs-cis CLI output

[gfudenberg]

don't save the column weight in the output of cooltools eigs-cis

[sergpolly]

I was thinking about it while reading #397 ...

this can be easily addressed in #397 - during the creation of an empty eigvecs_table using this modern pandas function:

eigvecs_table = eigvecs_table.reindex(columns=["chrom","start","end"]+eig_columns)