Account for updated CSV format

This pull request contains several changes to account for the latest CSV file.

* Accounts for column name changes in the CSV heading
* Adds Gambia as a country
* Removes the static country list. Instead, populate the donation form country field (the only user of that list) with entries from the DB
* Account for a CSV which has sector funds appearing after the projects which link to them
* Add additional debug logs to the dev settings file