Add social graph OmniGraffle diagrams

d84d3f52 · Donne Martin · 9d4bec43 · d84d3f52 · d84d3f52
Commit d84d3f52 authored Apr 02, 2017 by Donne Martin
--- a/solutions/system_design/social_graph/social_graph.graffle
+++ b/solutions/system_design/social_graph/social_graph.graffle
--- a/solutions/system_design/social_graph/social_graph_basic.graffle
+++ b/solutions/system_design/social_graph/social_graph_basic.graffle