adds support for other paramstyles, disables logging by default when Flask not running

[dmalan]

Previously, we only supported a paramstyle of named, https://www.python.org/dev/peps/pep-0249/#paramstyle. This adds support for all other paramstyle values as well as multiple calling conventions:

db.execute("SELECT * FROM Employee WHERE FirstName = ?", "' OR 1 = 1")

db.execute("SELECT * FROM Employee WHERE FirstName IN (?)", "Andrew")
db.execute("SELECT * FROM Employee WHERE FirstName IN (?)", ["Andrew"])
db.execute("SELECT * FROM Employee WHERE FirstName IN (?)", ("Andrew",))
db.execute("SELECT * FROM Employee WHERE FirstName IN (?)", ["Andrew", "Nancy"])
db.execute("SELECT * FROM Employee WHERE FirstName IN (?)", ("Andrew", "Nancy"))

db.execute("SELECT * FROM Employee WHERE FirstName = ? AND LastName = ?", "Andrew", "Adams")
db.execute("SELECT * FROM Employee WHERE FirstName = ? AND LastName = ?", ["Andrew", "Adams"])
db.execute("SELECT * FROM Employee WHERE FirstName = ? AND LastName = ?", ("Andrew", "Adams"))

db.execute("SELECT * FROM Employee WHERE FirstName = :1 AND LastName = :2", "Andrew", "Adams")
db.execute("SELECT * FROM Employee WHERE FirstName = :1 AND LastName = :2", ["Andrew", "Adams"])
db.execute("SELECT * FROM Employee WHERE FirstName = :1 AND LastName = :2", ("Andrew", "Adams"))

db.execute("SELECT * FROM Employee WHERE FirstName = :first AND LastName = :last", first="Andrew", last="Adams")
db.execute("SELECT * FROM Employee WHERE FirstName = :first AND LastName = :last", {"first": "Andrew", "last": "Adams"})

db.execute("SELECT * FROM Employee WHERE FirstName = %s AND LastName = %s", "Andrew", "Adams")
db.execute("SELECT * FROM Employee WHERE FirstName = %s AND LastName = %s", ["Andrew", "Adams"])
db.execute("SELECT * FROM Employee WHERE FirstName = %s AND LastName = %s", ("Andrew", "Adams"))

db.execute("SELECT * FROM Employee WHERE FirstName = %(first)s AND LastName = %(last)s", first="Andrew", last="Adams")
db.execute("SELECT * FROM Employee WHERE FirstName = %(first)s AND LastName = %(last)s", {"first": "Andrew", "last": "Adams"})

[kzidane]

Also added some test cases for qmark, named, and numeric on SQLite.

[dmalan]

@kzidane just added some checks to require that no passed-in values can go unused, whether using positional placeholders or named ones if you'd like to try this out before we ship.

[kzidane]

@dmalan just uncommented my test cases. Should be good if all green.

[kzidane]

@dmalan looks like it passed.