Fix 'ranch' app dependency upon re-start w/FLUs configured

... and allow direct start by machi_sup for EUnit tests.

src/machi.app.src

@@ -1,7 +1,7 @@
 {application, machi, [
     {description, "A village of write-once files."},
-    {vsn, "0.0.0"},
-    {applications, [kernel, stdlib, crypto, cluster_info]},
+    {vsn, "0.0.1"},
+    {applications, [kernel, stdlib, crypto, cluster_info, ranch]},
     {mod,{machi_app,[]}},
     {registered, []},
     {env, [

src/machi_sup.erl

@@ -65,5 +65,11 @@ init([]) ->
     LifecycleMgr =
         {machi_lifecycle_mgr, {machi_lifecycle_mgr, start_link, []},
          Restart, Shutdown, worker, []},
-
-    {ok, {SupFlags, [ServerSup, RanchSup, LifecycleMgr]}}.
+    RunningApps = [A || {A,_D,_V} <- application:which_applications()],
+    Specs = case lists:member(ranch, RunningApps) of
+                true ->
+                    [ServerSup, LifecycleMgr];
+                false ->
+                    [ServerSup, RanchSup, LifecycleMgr]
+            end,
+    {ok, {SupFlags, Specs}}.