DateTime::Format::Builder creates DateTime parsers. Many string formats of
dates and times are simple and just require a basic regular expression to
extract the relevant information. Builder provides a simple way to do this
without writing reams of structural code.
Builder provides a number of methods, most of which you'll never need, or at
least rarely need. They're provided more for exposing of the module's innards
to any sub-classes, or for when you need to do something slightly beyond what
is expected.
