- Patch #6847 by Gerhard: replaced vocabulary->nodes by a separate table and tidied up the taxonomy API a bit.  This fixes a number of issues.

- Fix tracker pager count query being wrong (it did not return a count but a set, and it counted nodes with more than 1 comment as multiple nodes).
- Clean up various SQL queries: removing literally inserted data (db_escape_string is evil!), fixing single "%" which should be "%%", fixing integers being compared as strings.

- Tiny code style fix

(e.g. admin.module was removed -> needs menu cache update).

- Patch #14731 by chx: made it possible to rewrite node queries.

- Patch #15570 by Drumm: integrated the admin and system module.  Renamed the callback as per Goba's suggestion.

- Patch #15337 by Gerhard: fixed bug in upgrade path.  The 'update_start' variable got corrupted.

Making the installation instructions a bit clearer for newbies and it explicitly explains that the commands are for the command line.

- Fixing broken "pagerank" detection

- Renamed 'visit' to 'view'.

- Watchdog improvement: added a 'view' link for 'access denied' messages.

- Patch #15399 by adschar: fixed PHP5 error when a new session is inserted into the session table. (Better fix.)

- Patch #15399 by adschar: fixed PHP5 error when a new session is inserted into the session table.