[SQLObject] TextCol

For those who like things more explicit, I was asked to create a
forced TextCol (instead of letting StringCol handle both cases).
Result:

class TextCol(StringCol):
    def __init__(self, *arg, **kw)
        #throw away possible keywords
        popKey(kw, 'length')
        popKey(kw, 'varchar')
        StringCol.__init__(self, *args, **kw)

Obviously it makes my life easier if it's checked in, but it's not too
important.

- Luke

--
 Many people are hamstrung by things like affection for
 fellow employees, honesty, desire to appear to be a
 "nice person," and other crippling limitations not
 suffered by the truly powerful and successful.