Ability to filter rows and columns

[aomarks]

Since we display an NxN matrix of benchmark results, the size of the table can get too large to fit in a normal terminal window. Also, in cases where we want to draw attention to only a subset of the results (e.g. for CI integration we usually only care about the results that compare the current PR to master and released, but not the other way around)

Add the ability to filter rows and/or columns of the NxN matrix.