(FR #986) mailing job to apologize for May 2013 PayPal recurring fail.

Incidentally created a "oneoffs" module to house this sorta stuff.

TODO: need the letter subject and body

Change-Id: Ic9ce7d36eeee0f9bbcbbdab65a578dd9f10d6b2c
Merge "(FR #986) mailing job to apologize for May 2013 PayPal recurring fail."
Supply first, last name and language code to the template

Change-Id: Ic1a86f80ccb81db96d8c1259f8fd0c42acf97761
Add the letter templates, make small fixes to code

Change-Id: I055978fd6331c22cf0af5ae66b95ec15099b28e9
Merge remote-tracking branch 'origin/master' into HEAD

- (FR #986) mailing job to apologize for May 2013 PayPal recurring fail.
- Supply first, last name and language code to the template
- Add the letter templates, make small fixes to code