* Adds basic validations for required fields
Also deletes a few extraneous .keep files
Does not add the family_id required field for user, since that breaks the basic test setup
* Restore keep files to this branch
* Remove Credit model and validate models behind ids
* Restore concerns .keep
* Initial foundational pass at multi-currency
* Default format currency
* More work on currency and exchanging
* Re-build currencies on change
* Currency import/setup
* Background job overhaul + cheaper OXR plan support
* Lint fixes
* Test fixes
* Multi-currency setup instructions
* Allow decimals in the balance field
* Spacing fix for form
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Signed-off-by: Josh Pigford <josh@joshpigford.com>
