Update README.md

Author: suneelbvs

README.md

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 **Installation and configuration:**
 
 Step 1: download and Install anaconda from anaconda.org
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 Step 2: Install conda environment from rdkit.yml by using this command in anaconda terminal : "conda env create -f environment.yml"
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 Step 3: check for installation : conda env list
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 Step 4: Activate the environment : conda activate rdkit-training
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 Step 5: check the list of packages available in rdkit-training env : conda list