Issue #196: Warning "PRICE() is deprecated; use GETPRICE() instead" even if I'm using the correct function (blais/beancount)

[mariosangiorgio]

New issue 196: Warning "PRICE() is deprecated; use GETPRICE() instead" even if I'm using the correct function
https://bitbucket.org/blais/beancount/issues/196/warning-price-is-deprecated-use-getprice

mariosangiorgio:

I noticed this while looking at the logs of a dev version of fava.

I find it confusing that the warning is reported even if I'm using the new function. I also spent a bit of time looking for usages of the deprecated function before I realised what is going on.

This is happening because both in `query_env.py` `getprice` and `price` map to the same object, which prints the warning.

```
#!python

# Note: Remove PRICE() at some point, GETPRICE() is less confusing.
('price', str, str) : Price,
('price', str, str, datetime.date) : PriceWithDate,
('getprice', str, str) : Price,
('getprice', str, str, datetime.date) : PriceWithDate,
```

How long is `price` going to stay around for? If it is for long I think we should stop `getprice` from printing the warning.