#319167: add_table() would return TRUE if the table was already added but the expected return is the alias.

query::add_field() called ensure_table too aggressively and could cause aliases to improperly overwrite already existing tables.

#282864: Fix collapsing relationships in CCK fields that was returning wrong value and breaking collapse.

query::add_relationship was adjusting the join for the relationship prematurely; add_table will do that on its own.

Fix a problem with relationships that caused the adjust_join to sometimes not be run, thanks to a minor error in the join collapsing code.

Initial taxonomy implementation. There's still a ways to go -- I totally punted on depth -- and we need a few more argument handlers.

Add basic support for summary styles; they don't quite work yet because view URL knowledge isn't implemented.

#188640 (by Crell): Add default views, and lots of comments, many of which need to be dealt with one way or another.

Very early checking for Views 2 for Drupal 6. Currently query.inc looks good and view.inc can at least load and save views, though the schema needs more tweaks.