Collected and present quantitative info at the start of the circular (Based on PnP comment of Daniel Holz)

The comment goes as :

I suggest that we put the most relevant information up front. So the top would be:

Summary: FAR = 9.1e-14 Hz, or about one in 1e6 years. Classification: BNS (95%), Terrestrial (4%), NSBH (1%), or BBH (<1%) HasNS >99%. HasRemnant >99%. HasMassGap is 20% 90% credible sky region is 24218 deg2 Luminosity distance is 29 +/- 9 Mpc Details:

I feel like it would be helpful to include this information in the human-readable GCNs as well. Many people read these to try to keep track of things, and it would be so helpful to have all the information at the top!