oldlib
 a bunch of stuff using an older version of lib/
 some of this needs to be resuccitated, like joseph's code in applications/torus2

lib
  basic constructions of homotopy type theory

homotopy
  applications of homotopy type theory to formalizing homotopy theory

programming
  applications of homotopy type theory to programming

computational-interp
  code having to do with the computational interpretation or 2tt

misc
  miscellaneous little experiments