pidgin/nest

c3b3dcf494c8
Add a bunch of shortcodes to make life easier.

These will need to be abstracted a bit to handle other stuff like libgnt,
gplugin, talkatu, etc, but this is way easier to deal with than it was.

Testing Done:
Ran locally and verified all of the Sourceforge links are working.

Reviewed at https://reviews.imfreedom.org/r/557/
hugo/themes/**/*
hugo/archetypes/**/*