THINK-14-TRN

I'd like some feedback on the way I'm overriding the setters for translatable strings. Note I also made some adjustments to the test harness as they are taking longer to run now that we are creating records for each translatable string.
instead of `Translation.find_or_initialize`, you should be able to do:
```
translations.where(base: true, field: method_name).first_or_initialize
```

Also, `base` looks like a good candidate for a scope, which would allow you to do `translations.base.where(...)`