Change ORDER BY to city_title ASC.

Changing ORDER BY option to city_title ASC removes the problem of semi-random display of wikis. It also improves browsing experience since results are now displayed in alphabethical order. Additionally minor fix of variable's $sPager naming has been done (it threw NOTICE in devbox enviroment).

@SQLReview 
1) QUERY
```sql
SELECT  city_id,city_title,city_url,city_public,city_dbname  FROM `city_variables`,`city_list`  WHERE (city_id = cv_city_id) AND (cv_value != 's:0:"";') AND (cv_variable_id = '384')  ORDER BY city_title ASC LIMIT 50
```
2) EXPLAIN
```
+----+-------------+----------------+--------+--------------------+---------+---------+--------------------------------------+------+----------------------------------------------+
| id | select_type | table          | type   | possible_keys      | key     | key_len | ref                                  | rows | Extra                                        |
+----+-------------+----------------+--------+--------------------+---------+---------+--------------------------------------+------+----------------------------------------------+
|  1 | SIMPLE      | city_variables | ref    | PRIMARY,cv_city_id | PRIMARY | 2       | const                                |  123 | Using where; Using temporary; Using filesort |
|  1 | SIMPLE      | city_list      | eq_ref | PRIMARY            | PRIMARY | 4       | wikicities.city_variables.cv_city_id |    1 |                                              |
+----+-------------+----------------+--------+--------------------+---------+---------+--------------------------------------+------+----------------------------------------------+
```

Only change is in the ORDER BY option to city_title ASC. Benefits:
- Wikis are alphabetically sorted and therefore it's easier to browse the list
- city_title column has a MUL key attribute, contrary to the previously used city_sitename.

```
+-------------------------+------------------+------+-----+---------------------------------+----------------+
| Field                   | Type             | Null | Key | Default                         | Extra          |
+-------------------------+------------------+------+-----+---------------------------------+----------------+
| city_id                 | int(9)           | NO   | PRI | NULL                            | auto_increment |
| city_path               | varchar(255)     | NO   |     | /home/wikicities/cities/notreal |                |
| city_dbname             | varchar(64)      | NO   | UNI | notreal                         |                |
| city_sitename           | varchar(255)     | NO   |     | wikicities                      |                |
| city_url                | varchar(255)     | NO   | UNI | http://notreal.wikicities.com/  |                |
| city_created            | datetime         | YES  | MUL | NULL                            |                |
| city_founding_user      | int(5)           | YES  | MUL | NULL                            |                |
| city_adult              | tinyint(1)       | YES  |     | 0                               |                |
| city_public             | int(1)           | NO   |     | 1                               |                |
| city_additional         | text             | YES  |     | NULL                            |                |
| city_description        | text             | YES  |     | NULL                            |                |
| city_title              | varchar(255)     | YES  | MUL | NULL                            |                |
| city_founding_email     | varchar(255)     | YES  |     | NULL                            |                |
| city_lang               | varchar(8)       | NO   |     | en                              |                |
| city_special_config     | text             | YES  |     | NULL                            |                |
| city_umbrella           | varchar(255)     | YES  |     | NULL                            |                |
| city_ip                 | varchar(256)     | NO   |     | /usr/wikia/source/wiki          |                |
| city_google_analytics   | varchar(100)     | YES  |     |                                 |                |
| city_google_search      | varchar(100)     | YES  |     |                                 |                |
| city_google_maps        | varchar(100)     | YES  |     |                                 |                |
| city_indexed_rev        | int(8) unsigned  | NO   |     | 1                               |                |
| city_lastdump_timestamp | varchar(14)      | YES  |     | 19700101000000                  |                |
| city_factory_timestamp  | varchar(14)      | YES  |     | 19700101000000                  |                |
| city_useshared          | tinyint(1)       | YES  |     | 1                               |                |
| ad_cat                  | char(4)          | NO   |     |                                 |                |
| city_flags              | int(10) unsigned | NO   | MUL | 0                               |                |
| city_cluster            | varchar(255)     | YES  | MUL | NULL                            |                |
| city_last_timestamp     | timestamp        | NO   |     | CURRENT_TIMESTAMP               |                |
| city_founding_ip        | int(10) unsigned | NO   | MUL | 0                               |                |
+-------------------------+------------------+------+-----+---------------------------------+----------------+
```