Final edits for SIGCOMM tutorial (#191)

* Final updates for SIGCOMM '18

* Final updates for SIGCOMM '18

exercises/load_balance/README.md

@@ -129,4 +129,4 @@ mn -c
 
 ## Next Steps
 
-Congratulations, your implementation works and you have finished the tutorial!
+Congratulations, your implementation works! Move on to [Multi-Hop Route Inspection](../mri).

exercises/other/calc/README.md

@@ -104,9 +104,4 @@ correct result:
 > 1+1
 2
 >
-```
-
-## Next Steps
-
-Congratulations, your implementation works!  Move on to
-[Load Balancer](../load_balance).
+```

exercises/other/ecn/README.md

@@ -190,9 +190,3 @@ these instances:
 ```bash
 make stop
 ```
-
-## Next Steps
-
-Congratulations, your implementation works!  Move on to the next
-exercise: [Multi-Hop Route Inspection](../mri), which identifies which
-link is the source of congestion.

exercises/source_routing/README.md

@@ -143,5 +143,5 @@ mn -c
 
 ## Next Steps
 
-Congratulations, your implementation works!  Move on to
-[Calculator](../calc).
+Congratulations, your implementation works! Move on to
+[Load Balance](../load_balance).