[DEV-2093] Add a setting for karma display name.
[DEV-2093] Change uses of karma to use new setting.
[DEV-2093] Fix variable use in trans tag.
[DEV-2093] Change "Karma" to "Treats."
[DEV-2093] Differentiate setting for karma display name into singular and plural settings.
[DEV-2093] Update capitalization and pluralization.
Merge pull request #49 from roverdotcom/DEV-2093

[DEV-2093] Change "karma" to something else.