Update CHANGELOG.md
Replace none strings in config
Dammit
Add test for replace_nones
Clean up instances of janky none string handling from config
Merge pull request #70 from thieman/tnt-config-none

Replace none strings in config
Closes #67. Warn on unrecognized email key.
Merge pull request #71 from thieman/tnt-restrict-email-handler

Closes #67. Warn on unrecognized email key.