readme: update README with draft cycles as png

Author: SidoShiro

README.md

@@ -82,4 +82,17 @@ mpirun --hostfile hostfile dmalloc [DOTFILE]
 | kill `id`                         | kill node refered by `id`                               |
 | revive `id`                       | revive `id`                                             |
 
+## Node Life Cycles
+
+### Node Leader Elections
+
+![Graph leader election](doc/node_election.png)
+
+### Node Leader Cycle
+
+![Graph leader cycle](doc/node_leader_proc.png)
+
+### Node Cycle
+
+![Graph leader election](doc/node_proc.png)