Merge pull request #18 from elenagr/master

Modify create dictionary and new function for corpus
Cleaned up repeated functions
Merge pull request #21 from emsiepopples/master

Cleaned up repeated functions
Revert "Cleaned up repeated functions"
Merge pull request #22 from s2ds-kpmg1/revert-21-master

Revert "Cleaned up repeated functions"
Moved functions into enron.py
Merge pull request #23 from emsiepopples/master

Moved functions into enron.py
Cleaned up repeated functions
Merge pull request #24 from emsiepopples/master

Cleaned up repeated functions
Merge pull request #25 from elenagr/master

Create_corpus, corpus and little modifications
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