content_taxonomy 6.x-1.0-beta2

Changes since beta1:
- added update function from 5.x to 6.x
- added implementation of hook_taxonomy() to keep data consistent in cck tables
- added un-/install, en-/disable hooks
- added maxlength settings for autocompletes
- added parent php code setting
- fixing of inserting new terms with autocompletes
- some renaming of texts and setting variables

Note: Upgrade from Beta1 to Beta2 needs update.php executed