telegram refactor 1/ (#389)

* telegram refactor 1/

move out freqcode from telegram

* telegram refactor 2/

move out rpc_trade_status

* telegram refactor 3/

move out rpc_daily_profit

* telegram refactor /4

move out rpc_trade_statistics

* 5/

* rpc refactor 6/

* rpc refactor 7/

* rpc refactor 8/

* rpc refactor 9/

* rpc refactor 10/

cleanups
two tests are broken

* fiat

* rpc: Add back fiat singleton usage

* test: rpc_trade_statistics

Test that rpc_trade_statistics can handle trades that lacks
trade.open_rate (it is set to None)

* test: rpc_forcesell

Also some cleanups

* test: telegram.py::init

* test: telegram test_cleanup and test_status

* test rcp cleanup

freqtrade/tests/conftest.py

@@ -272,3 +272,10 @@ def default_strategy():
     strategy = Strategy()
     strategy.init({'strategy': 'default_strategy'})
     return strategy
+
+
+# FIX:
+# Create an fixture/function
+# that inserts a trade of some type and open-status
+# return the open-order-id
+# See tests in rpc/main that could use this