Merge branch 'master' ...
New comic: artificial intelligence
New comic: Naming conventions
Added "extra_classes" for individual dialogue bubbles.
Added "mechanical_voice" as a dialogue class and moved the clockwise and padded classes to be dialogue classes.
Two new comics.
"standingonhead" pose for H, and a new comic that uses it
added an "upside-down" class for use in a future comic... and also *actually* added the new images that I said I did in the previous commit