Add analyze logic that uses multiple directories

[wckzhang]

The code I wrote to analyze multiple directories and average the data + grpahing would be useful. Needs to be cleaned up, organized better.

[wckzhang]

It would be useful to have some sort of weighted average in this case. Likely for each collective, alg, and directory result, a minimum latency will be found and each message size latency will be divided by the minimum latency. This will show a relative increase when comparing data from different clusters.