some fixes from dialyzer output

lib/geef/pkt.ex

@@ -8,8 +8,8 @@ defmodule Geef.Pkt do
   
   def parse_request(str) do
     case :geef_pkt.parse_request(str) do
-      {:ok, req} ->
-        {:ok, Geef.Request.new req}
+      {:ok, {:geef_request, service, path, host}} ->
+        {:ok, %Geef.Request{service: service, path: path, host: host}}
       error ->
         error
     end

lib/geef/signature.ex

@@ -14,7 +14,7 @@ defmodule Geef.Signature do
     %Geef.Signature{name: name, email: email, time: time}
   end
 
-	def to_record(%Geef.Signature{name: name, email: email, time: time}) do
+  def to_record(%Geef.Signature{name: name, email: email, time: time}) do
     {:geef_signature, name, email, time}
   end
 

lib/geef/tree.ex

@@ -71,13 +71,13 @@ defimpl Enumerable, for: Geef.Tree do
   alias Geef.TreeError
 
   def count(tree) do
-    Tree.count(tree)
+    {:ok, Tree.count(tree)}
   end
 
   def member?(tree, key) do
     case Tree.get(tree, key) do
-      {:ok, _} -> true
-      _ -> false
+      {:ok, _} -> {:ok, true}
+      _ -> {:ok, false}
     end
   end