s55462__imagehash tables phash and and dhash have approx 20M rows each and it takes 4GB+4GB on disk. Target is to refactor it so that tables would be smaller
**Changes**
* url field is dropped.
* DROPPED FROM DB: source is source_id and source is another table
* DROPPED FROM DB: type is type_id and type is another table
* thumb_width = int
* width = orig_width()
* height = orig_width()
**Current db**
```
MariaDB [s55462__imagehash]> describe dhash;
+---------+---------------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+---------------------+------+-----+---------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| commons | int(11) | YES | MUL | NULL | |
| hash | bigint(20) unsigned | YES | MUL | NULL | |
| type | varchar(32) | YES | | NULL | |
| source | varchar(32) | YES | | NULL | |
| width | int(11) | YES | | NULL | |
| height | int(11) | YES | | NULL | |
| created | timestamp | NO | | current_timestamp() | |
| url | varchar(1024) | YES | | NULL | |
+---------+---------------------+------+-----+---------------------+----------------+
```
**Current size**
```
MariaDB [s55462__imagehash]> SELECT (data_length+index_length)/power(1024,3) tablesize FROM information_schema.tables WHERE table_schema='s55462__imagehash' and table_name='phash';
+-------------------+
| tablesize |
+-------------------+
| 4.044891357421875 |
+-------------------+
1 row in set (0.001 sec)
MariaDB [s55462__imagehash]> SELECT (data_length+index_length)/power(1024,3) tablesize FROM information_schema.tables WHERE table_schema='s55462__imagehash' and table_name='dhash';
+-------------------+
| tablesize |
+-------------------+
| 4.066375732421875 |
+-------------------+
1 row in set (0.001 sec)
```