- repair test_processors which wasn't hitting the python functions
- add another suite to test_processors that does distill_params

This breaks backwards compatibility with old SQLite DATETIME, DATE,
and TIME storage_format strings. Formatting now occurs with named instead
of positional parameters. The regexp argument can still use positional
arguments, but named groupings are also supported. This means that you can
omit fields and change the order of date fields as desired.

SQLite's DATETIME and TIME also gained a truncate_microseconds argument.
This is shorthand for modifying the format string. Fortunately the
str_to_datetime and str_to_time processors written in C already support
omitting microseconds, so we don't have to resort to python processing
for this case.

or invalid string is passed to any of the
date/time processors used by SQLite, including
C and Python versions.  [ticket:2382]
- changed the import model of processors.py so that we can
get at the pure python versions and C versions simultaneously
in tests.

    illegal date/time/datetime string parsed from
    the database regardless of whether C
    extensions are in use or not.

  a consistent tag
- AUTHORS file

to int, for DBAPIs such as pymssql that naively call
str() on values.