- Internal changes for Nim 1.4.

- Refactor to remove includes which also involved exposing some previously internal fields.
- Removed quitProcs.
- Errors/info reported by function calls now displays the proc and line the error occurs.
- This release no longer supports the `Time` type (use `DateTime` instead) due to an inability to convert to other formats.

* GUID / unique identifier support.

* Fixes to `dbq`.
* Better error reporting defaults.

Update documentation for 0.2.1

 * Added `asBinary` support for times. All field types now allow conv…

…ersion to `seq[byte]`.

  * Added `tryData` for `SQLResults`, allowing speculatively fetching values without raising an error if the field doesn't exist.
  * Added `fieldIndex`, `fields`, and `hasField` procs for `SQLResults`.
  * Added millisecond and microsecond population for time fields.
    Times now have microseconds and milliseconds populated and nanoseconds are appropriately truncated by default.
  * Added `distributeNanoseconds` to manually invoke sub-second field population from `nanoseconds` on a `TimeInterval`.
  * Added `stuffNanoseconds` to assemble the fractional part of a `TimeInterval` to nanoseconds.
  * Added `odbcRawTimes` compile-time switch to avoid populating milliseconds and microseconds or truncating nanoseconds.
    This leaves the entire sub-second fractional component represented in nanoseconds.
  * Added tests for `data`, `tryData`, `fieldIndex`, and `listDrivers`.
  * Exposed `SQLDriverAttribute`.
  * Deprecated `fromField` used with SQLResults, as it now does the same work as `data`.
  * `data` doesn't need `var SQLResults` any more.
  * Removed the internal variable `fieldNames`, a functional duplicate of `fieldnamesIndex` in SQLResults.
  * Tidied up the date time test, add option to only check times up to seconds precision.