Handle oracle operation in FATE (#90)

* Handle oracle operation in FATE

Keep oracle type information on fcode level

Introduce typereps as values

Handle oracle registration

Handle oracle query object and oracle_query op

Handle oracle get question

Handle oracle query fee

Handle oracle get answer

Handle oracle respond

Handle oracle extend

* Address review comment

rebar.lock

@@ -1,7 +1,7 @@
 {"1.1.0",
 [{<<"aebytecode">>,
   {git,"https://github.com/aeternity/aebytecode.git",
-       {ref,"506f9ca72ea5df5fb2abd3aaddcbf9d58423e556"}},
+       {ref,"e321882b9830eea5ce5ab8801e8b19fd350a4e00"}},
   0},
  {<<"aeserialization">>,
   {git,"https://github.com/aeternity/aeserialization.git",