Add requirements.txt for installation

requirements.txt

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+finviz==1.3.4
+yahoo_fin==0.8.4
+psaw==0.0.12
+fuzzywuzzy==0.18.0
+pytz==2019.3
+pmdarima==1.8.0
+yfinance==0.1.55
+numpy==1.17.3
+config==0.5.0.post0
+alpha_vantage==2.3.1
+prettytable==2.0.0
+holidays==0.10.5.2
+xlwings==0.16.4
+praw==7.1.3
+pandas_ta==0.2.23b0
+statsmodels==0.12.2
+tensorflow==2.1.0
+requests==2.18.4
+matplotlib==3.1.1
+pandas==1.1.5
+Quandl==3.6.0
+XlsxWriter==1.2.7
+beautifulsoup4==4.9.3
+FundamentalAnalysis==0.2.6
+scikit_learn==0.24.1