move qtpylib to vendor folder

This is necessary to distribute qtpylib with
freqtrade when you install it globally.

MANIFEST.in

@@ -1,8 +1,5 @@
 include LICENSE
 include README.md
 include config.json.example
-include freqtrade/exchange/*.py
-include freqtrade/rpc/*.py
-include freqtrade/tests/*.py
+recursive-include freqtrade *.py
 include freqtrade/tests/testdata/*.json
-include qtpylib/*.py

freqtrade/analyze.py

@@ -5,10 +5,10 @@ from datetime import timedelta
 import arrow
 import talib.abstract as ta
 from pandas import DataFrame, to_datetime
-from qtpylib.indicators import awesome_oscillator, crossed_above
 
 from freqtrade import exchange
 from freqtrade.exchange import Bittrex, get_ticker_history
+from freqtrade.vendor.qtpylib.indicators import awesome_oscillator
 
 logging.basicConfig(level=logging.DEBUG,
                     format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')

freqtrade/tests/test_hyperopt.py

@@ -1,16 +1,16 @@
 # pragma pylint: disable=missing-docstring
-from operator import itemgetter
 import logging
 import os
 from functools import reduce
 from math import exp
-import pytest
-from pandas import DataFrame
-from qtpylib.indicators import crossed_above
+from operator import itemgetter
 
+import pytest
 from hyperopt import fmin, tpe, hp, Trials, STATUS_OK
+from pandas import DataFrame
 
 from freqtrade.tests.test_backtesting import backtest, format_results
+from freqtrade.vendor.qtpylib.indicators import crossed_above
 
 logging.disable(logging.DEBUG) # disable debug logs that slow backtesting a lot