MIME::Base64

After starting on Plumhead, aka PlumHeaded Parakeet, I stumbled on base64 encoded strings embedded in the XML emitted by phc.

The plan is to create Parrot Intermediate Representation from XML. So I became sidetracked into making a MIME::Base64 module for PIR. As usual it took longer than expected, even though I found a nice German tutorial. So an incomplete implementation is now at http://svn.perl.org/viewcvs/parrot/trunk/runtime/parrot/library/MIME/Base64.pir.

The tests I stole from the Perl5 module MIME::Base64. Thanks to Will Coleda for compilers/json, which helps in setting up the test cases.