VERSION 0.0.6
Ignore direnv files
Add missing development dependencies to cpanfile
Remove legacy extlib/ ignores
Bump version to 0.0.7_1
sha1* functions only take one argument

There is no obvious, valid reason for having written these functions to
take more than one argument. I'm limiting it now so it doesn't surprise
me somewhere later on.
Add author tests
New API: agg_sha1*($expr, $sort_expr)

The old api didn't make sense for two reasons:

    - SQLite doesn't guarantee the order in which $expr is fed to the
      aggregation function
    - Who needs more than one $expr in SQL? Can concatenate if
      required.
Release version 0.0.7_1 (2014-04-20)
Start development for version 0.0.7_2