setConstraints should support constraintLogic and codes

An important part of InterMine querying is the ability to set OR logic for constraints, as well as the default AND logic.

This code throws an error, because [neither code nor constraintLogic are permissible arguments in `setConstraints`](https://github.com/intermine/InterMineR/blob/master/R/setConstraints.R#L3):

```r
pancreasConstraint2 = setConstraints(
paths = c("Gene", "Gene.proteinAtlasExpression.level", "Gene.proteinAtlasExpression.level", "Gene.proteinAtlasExpression.tissue.name"),
operators = c("IN", rep("=", 2), "="),
values = list("PL_DiabetesGenes", "Medium", "High", "Pancreas"),
code = c("A", "B", "C", "D"),
constraintLogic = "A and (B or C) and D"
)
```

remove the invalid (but needed) code and constraintLogic arguments and it all works fine.