Rebar and eunit changes

Initial rebar compile - which exposed eunit tets failures associated
with changes to file structures and filename references

src/eleveleddb_app.erl

@@ -0,0 +1,16 @@
+-module(eleveleddb_app).
+
+-behaviour(application).
+
+%% Application callbacks
+-export([start/2, stop/1]).
+
+%% ===================================================================
+%% Application callbacks
+%% ===================================================================
+
+start(_StartType, _StartArgs) ->
+    eleveleddb_sup:start_link().
+
+stop(_State) ->
+    ok.