Starting BBSim API Server
Adding SerialNumber to GetDeviceInfo response (it's now required by
VOLTHA)

Change-Id: If726b5c313b6a424f54682aef68c001f6de51b57
diff --git a/api/.gitignore b/api/.gitignore
new file mode 100644
index 0000000..5a7fb48
--- /dev/null
+++ b/api/.gitignore
@@ -0,0 +1 @@
+**/*.pb.go
\ No newline at end of file