Create readme.md

Author: ARUNAGIRINATHAN-K

Facebook Sentiment Analysis using python/readme.md

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+# Installations in Anaconda
+
+**NLTK :** is used for understanding of human natural language. 
+
+Installation Using conda command.
+ ```
+conda install -c anaconda nltk
+```
+Installation Using pip.
+```
+pip install nltk
+```
+**NumPy :** is a python package used for scientific and computional methods in python. 
+
+Installation Using conda.
+```
+conda install -c conda-forge numpy
+```
+Using pip.
+```
+pip install numpy
+```
+**Pandas :** is a python module used for data preprocessing and analysis . 
+
+Installation Using conda
+```
+conda install -c anaconda pandas
+```
+Installation Using pip.
+```
+pip install pandas
+```
+**Matplotlib :** is a python module used for data visualization and and 2D plotting for representation of data. 
+
+Installation Using conda.
+```
+conda install -c conda-forge matplotlib
+```
+
+Installation Using pip.
+```
+pip install matplotlib
+```
+
+## Authentication
+There are many ways to fetch Facebook comments those are: 
+
+- Facebook graph API
+- Direct download from Facebook
+- Downloading from another dataset provider sites