Don't fail when adding records with no parent.

When you use SwatDBRecordsetWrapper::attachSubRecordset() and the
recordset being added contains records that point to records not in this
recordset, those records should be ignored.

For example:

set of images -> 1, 2, 3, 4, 5, 6
set of dimensions referring to images -> (1,2), (2,2), (3,1), (4,10)

If the dimensions are attached to the images the dimension binding
(4,10) which does not match any image should be ignored rather than
causing an error.
Merge pull request #6 from gauthierm/attach-recordset-ignore

Don't fail when adding records with no parent.
prepare for release of 2.0.6
Fix issue when multiple records need to be ignored

The previous fix to ignore records that are not referenced in the parent
set only worked for the first record referencing a parent. If there was
more than one record referencing the same non-existent parent it still
failed.

This moves the ignore check outside the current_record_id check and
fixes the issue.
Merge pull request #7 from gauthierm/recordset-ignore-fix

Fix issue when multiple records need to be ignored
prepare for release of 2.0.7 | horton and emrap launch