Add a new output with correlations of guide counts between samples

[tfenne]

One other nice QC to have is a set of correlations between samples. This might look something like this:

sample1   sample2   r2     control_r2   essential_r2   nonessential_r2   other_r2
plasmid   day7      0.76   0.94         0.62           0.92              0.87
...