Implement parsers for various data types + auto-detect data type

[alexandru-dinu]

From https://meta.wikimedia.org/wiki/Help:Sorting:

The way items are sorted depends on the data type of the first rows. To determine the data type, the first 5 non-blank rows below the header are tested after loading the page and the most appropriate format is chosen. Mismatches are possible. The sort order of a column can be forced [using data-sort-type="..."].

jquery.tablesorter.js defines the following parsers:

• [ ] 1. (fallback, default) text
• [ ] 2. IPAddress
• [ ] 3. currency
• [ ] 4. url
• [x] 5. isoDate
• [ ] 6. usLongDate
• [ ] 7. date
• [ ] 8. time
• [ ] 9. number

then it tries to detect parser for column.

This may be the most straightforward way of dealing with multiple data types and ensure minimal tinkering on user's part.