Merge pull request #1 from keithseahus/develop

Create Enum.Plus
Merge pull request #2 from keithseahus/develop

Develop
Merge pull request #3 from keithseahus/develop

Develop
Merge pull request #4 from keithseahus/develop

Add default for EnumX.group_by/4
Merge pull request #5 from keithseahus/develop

Develop
Merge pull request #6 from keithseahus/develop

Fix typo
Merge pull request #7 from keithseahus/develop

Fix location of a file
Merge pull request #8 from keithseahus/develop

Group functions by module
Update README.md