bump version to 0.9.21

col header warnings + adding instance flattening tag

bump version to 0.9.17: adding support for xform to json

persist version change in all the necessary places

bump version to 0.9.15

Version Nathan is planning to hand off the VM with.

version 0.9.8

version 0.9.7

version 0.9.6

version 0.9.5