Make table-magic understand SQL

[stevecat]

This adds an "SQL" tab to table-magic, this allows it to interpret the tables produced by MySQL's command line interface. For example:

+------+-------+-------+
| Item | Value | Count |
+------+-------+-------+
| Ham  | 6     | 20.00 |
| Spam | 2     | 6.40  |
| Eggs | 12    | 2.00  |
+------+-------+-------+

Can become:

Item	Value	Count
Ham	6	20.00
Spam	2	6.40
Eggs	12	2.00