Add support for a transformation routine

A few of the quote functions could benefit from a filtering routine.

Examples:

* My next lightning talk will be called "flrbbbbb! rakkk!! zlonk!!!"
  should actually be:
  My next lightning talk will be called "Flrbbbbb! Rakkk!! Zlonk!!!"
  using ucfirst

* You know, my favorite pornstar is definitely Joselyn_Pink.
  should be:
  You know, my favorite pornstar is definitely Joselyn Pink.
  using y/_/ /

So you could replace the current third argument with an optional
coderef to be used on the list returned by metaname().
add some effects to some of the quotes
why so strict?
some more filtering of the 'batman' quote
minor style fixes in the documentation
a few more style changes, and also correct the copyright date
historical note and links to ismybit.ch
reword the "no bugs" claim
new method: available_quotes
tell the truth about new()
Changes for version 0.03