Defines the Tds.Error struct.

The struct has two fields:

• :message: expected to be a string

• :mssql: expected to be a keyword list with the fields line_number,

        `number` and `msg_text`

Usage

iex> raise Tds.Error
** (Tds.Error) An error occured.

iex> raise Tds.Error, "some error"
** (Tds.Error) some error

iex> raise Tds.Error, line_number: 10, number: 8, msg_text: "some error"
** (Tds.Error) Line 10 (8): some error