v1.32 - map2stan enhancements etc.

- added dzipois
- added WAIC and supporting functions
- added resample
- added plot and pairs methods for map2stan
- blank uses thinner margins now
- added link, which computes predictions for map2stan
- starting a tests file
- added Bolker's reedfrogs, so students don't have to load emdbook and
get a dbetabinom conflict
- added some man pages