some notes on the general idea of persisting network calls in brawl

doc/persisted-network-calls.md

@@ -0,0 +1,8 @@
+# General Pattern of implementing a persisted network call
+
+ 1. do network request
+ 1. start transaction
+ 1. write result of network request into transaction store, keeping differences from previous store state in local variables
+ 1. close transaction
+ 1. apply differences applied to store to in-memory data
+ 1. emit events for changes