Merge pull request #1838 from deepchem/gitignore

# Vim swap

*.swp

# Dataset files

datasets/2008-2011_USPTO_reactionSmiles_filtered.zip

datasets/2008-2011_USPTO_reactionSmiles_filtered/

datasets/autodock_vina_1_1_2_mac_catalina_64bit/

datasets/chembl_25-featurized/          

datasets/chembl_25.csv.gz                 

datasets/delaney-featurized/  

datasets/from-pdbbind/                                   

datasets/kinase/                                         

datasets/pdbbind/                                        

datasets/pdbbind_v2015.tar.gz

datasets/qm7-featurized/ 

datasets/qm7.csv                                         

datasets/qm7.mat

datasets/sider-featurized/

datasets/sider.csv.gz

datasets/sweet-featurized/

datasets/sweet.csv.gz

datasets/tox21-featurized/

datasets/toxcast-featurized/

datasets/toxcast_data.csv.gz

datasets/gdb8.tar.gz

datasets/qm8-featurized/

datasets/qm8.sdf

datasets/qm8.sdf.csv

datasets/PDBbind_2019_plain_text_index.tar.gz

datasets/pdbbind_v2019_NL.tar.gz

datasets/pdbbind_v2019_PN.tar.gz

datasets/pdbbind_v2019_PP.tar.gz

datasets/pdbbind_v2019_other_PL.tar.gz

datasets/pdbbind_v2019_refined.tar.gz

datasets/qm8.csv