BUYOTHER and SELLOTHER OFX transaction types are not recognized

[asciipip]

One of my institutions uses BUYOTHER and SELLOTHER types for most of the transactions in its OFX files. See example.zip for a small example.

beancount_import doesn't recognize those and just ignores them. It should treat them like other stock transaction types.

If I have time, I'll see about putting together a pull request, but I was able to get it to work by editing ofx.py in roughly the following ways:

• Adding , 'BUYOTHER', 'SELLOTHER' to STOCK_BUY_SELL_TYPES just before the definition of ParsedOfxStatement
• Adding , 'SELLOTHER' to SELL_TYPES on the next line
• Adding |buyother|sellother to the transaction type regex near the beginning of ParsedOfxStatement.__init__()

[Zburatorul]

Would be great to get a PR from you on this. We can refine from there.