add ability to retrieve only by certain evidence types for associations

[selewis]

Seems to work differently, but will check again when my glucose levels are higher.

[cmungall]

need an example

[selewis]

ZFIN:ZDB-GENE-041212-53 is a good example. This is for the slimmer. For example the ATP binding should not be retrieved as this is an IEA.

[selewis]

It appears that map2slim ignores the exclude_automatic_assertions param when it does the initial query for associations. At least that's the working theory.