adding some utilities for getting info about the polyfills

This might not be useful, so feel free to reject but these are the utilities I built to help me suggest a default set of polyfills.  There are 3 in total:

**polyfillsBySize** loads in the source of each polyfill, minifies it, then grabs it's size and spits out a list of all with the size in KB.  It splits the list at the 1K mark.
**polyfillTestReport** displays polyfills with and without tests
**polyfillSuggestor** uses both the others to suggest polyfills for the default set.