Merge branch 'initial' into 'master'

.editorconfig

.eslintignore

.eslintrc.js

.gitignore

.gitmodules

.prettierignore

__tests__/files/gmail-gmail/empty

__tests__/files/gmail-outlook/01/r_htmlContent.html

__tests__/files/gmail-outlook/01/r_plainContent.data

__tests__/files/gmail-outlook/01/s_htmlContent.html

__tests__/files/gmail-outlook/01/s_plainContent.data

__tests__/files/gmail-outlook/02/r_htmlContent.html

__tests__/files/gmail-outlook/02/r_plainContent.data

__tests__/files/gmail-outlook/02/s_htmlContent.html

__tests__/files/gmail-outlook/02/s_plainContent.data

__tests__/files/gmail-outlook/03/r_htmlContent.html

__tests__/files/gmail-outlook/03/r_plainContent.data

__tests__/files/gmail-outlook/03/s_htmlContent.html

__tests__/files/gmail-outlook/03/s_plainContent.data

__tests__/files/gmail-outlook/04/r_htmlContent.html