Change date 3.6

Change date v2.6 changes:

Now compatible with XF 2.0, XF 2.1 and XF 2.2.

Change date v2.5 changes:

Updated change date overlay to show date selector first.

Change date v2.4 changes:

Now using XenForo functions for performing database updates.

Change date v2.3 changes:

Now using finder for performing database queries.

Change date v2.2 changes:

Fixed issue with changing first post in a thread. Now properly updates the position of the post.

Change date v2.1 changes:

Fixed issue with showing the latest post in the forum list.

Change date v2.0 changes:

Fixed search index variable.

Change date v1.9 changes:

Fixed default search index variables.

Change date v1.8 changes:

Now updates search indexes.

Change date v1.7 changes:

Updated view variable.