Namespace the records

This makes it useful for users of the bindings. The naming is the same
as the module to allow elixir to treat the records in much the same
way as its native module/record hybrid.

src/geef_repo.erl

@@ -33,7 +33,7 @@ discover(Path) ->
 
 %% @doc Open an existing repository. Path must point to the git-dir or
 %% worktree
--spec open(iolist()) -> {ok, repo()} | {error, term()}.
+-spec open(iolist()) -> {ok, pid()} | {error, term()}.
 open(Path) ->
     case geef_nif:repository_open(Path) of
 	{ok, Handle} ->
@@ -64,7 +64,7 @@ workdir(Pid) ->
 
 %% @doc The repository's current object database. This encompasses all
 %% the configured backends.
--spec odb(pid()) -> {ok, odb()} | {error, term}.
+-spec odb(pid()) -> {ok, geef_odb()} | {error, term}.
 odb(Pid) ->
     gen_server:call(Pid, odb).
 
@@ -176,7 +176,7 @@ start_link(Handle) ->
 handle_odb(Handle) ->
     case geef_nif:repository_get_odb(Handle) of
 	{ok, OdbHandle} ->
-	    {ok, #odb{handle=OdbHandle}};
+	    {ok, #geef_odb{handle=OdbHandle}};
 	Other ->
 	    Other
     end.
@@ -189,7 +189,7 @@ handle_revwalk(Handle) ->
 	    Error
     end.
 
-handle_create_reference(Repo, Refname, #oid{oid=Oid}, Force) ->
+handle_create_reference(Repo, Refname, #geef_oid{oid=Oid}, Force) ->
      geef_nif:reference_create(Repo, Refname, oid, Oid, Force);
 handle_create_reference(Repo, Refname, Target, Force) ->
     geef_nif:reference_create(Repo, Refname, symbolic, Target, Force).