import remaining pages from riceissa.github.io

and also delete all blank YAML fields
convert to pandoc math
-> pandoc math
-> pandoc math
-> pandoc math
-> pandoc math; might be some problems: check riceissa.github.io
-> pandoc math
fix liquid
fix code (some liquid)
-> pandoc math
fix space
Saving this because site now compiles with tag links and everything
delete test fields
add dummy tag just so things don't break :/
add CC-BY template -- unused for now