Moving generated ksonnet lib from lib/<verson> to lib/ksonnet-lib/<version>.
This change will free up lib to be used for other lib type things.

Ksonnet will warn if ksonnet-lib is in the legacy location and the
user can use `ks upgrade` to move the files to their new location.

Also:

* update Makefile to search harder for apimachiner revision

Signed-off-by: bryanl <bryanliles@gmail.com>