find_in_batches should use lexicographic select
Fix warning when scopes and limits are used
Ensure find_in_batches works with existing scopes
Simplify batch query
Merge pull request #150 from jordanbyron/find_in_batches

find_in_batches should use lexicographic order
Fix up nested attributes. #141.
Add helper parse method for cpk ids.
Merge branch 'master' of github.com:drnic/composite_primary_keys
Update history and version.
added auxiliary autoincrement key handling (along with unit tests
etc.), however
 1) I could test it only with mysql and sqlite3 (no time to test it with other
    dbs)
 2) the unit tests I designed work, but many other tests fail (but apparently
    it has nothing to do with my code - it's something that  depends  of
    fixture design on some other tests
 3) I'm not even sure this code is a good idea (I have a specific legacy case
    with a database that increments one of the two keys on a composite
		primary, but the db is poorly designed)
YMMV