Validate providing type, add validate() which return a list of errors
Use callback-style error handling and refactor some more
JSON response now holds a list of errors
Use map() and html()
Remove .trim()
Use map()
Change the way providing type is read from the Excel

- Do not rely on providingType key order (there is no such thing)
- Read providingType as keys from the enum, and turn to an array afterwards
- Be more functional in the way to resulting object is built
Inline var
Add provider message field to provider registration form
Change wording and refactor error handling
Add new provider excel files with empty columns removed and text changes
Update provider excel files with formatting changes
Merge pull request #58 from kavi-fi/excel-providing-type-validation

Validate program type in provider excel registration and add provider message field to registration form