Implemented next [monthname] & last [monthname] parsing and
added according tests. [Shawn M. Moore sartak@gmail.com]Added tests for the constant daytime values.
Albeit it's unlikely that someone will ever subclass Lang/Base.pm,
a bug in the statement involving bless() within the constructor has
been fixed (ref($class) 'check' must come first, otherwise subclassing
is impossible).scripts/dateparse is now being installed.