saveQuery, freeQuery, queryByIndex for SWIG mapscripts

[sgillies@…]

Just like the PHP mapscript.

[sgillies@…]

There's no reason why this shouldn't be in 4.4.  Will be quick to do and easy
to test.

[aryan@…]

Don't forget loadQuery, saveQuery's darling sibling.

[sgillies@…]

saveQuery, freeQuery, loadQuery are in place.  Below is the test 
that shows how they are used.

    def testSaveAndLoadQuery(self):
        """test saving query to a file"""
        results = self.pointquery()
        self.map.saveQuery('test.qry')
        self.map.freeQuery()
        results = self.layer.getResults()
        assert results == None
        self.map.loadQuery('test.qry')
        results = self.layer.getResults()
        assert results is not None

queryByIndex is in as well.  Here's the test.
        
    def testQueryByIndex(self):
        """pop a result into the result set"""
        self.layer.queryByIndex(self.map, -1, 0, mapscript.MS_FALSE)
        results = self.layer.getResults()
        assert results.numresults == 1
        self.layer.queryByIndex(self.map, -1, 0, mapscript.MS_TRUE)
        results = self.layer.getResults()
        assert results.numresults == 2
        
If you leave off the 4th argument, the default is to clobber the existing
query results instead of adding.

Should be in hobu's next build.  You could come on to IRC and see if he'll
build a new one for you now.  After you confirm, I'll close up this bug.

[sgillies@…]

closing.  my tests pass.  we'll reopen if there are any problems.