Revert "remove releasetools"

some sort of circular dependancy?
test for it

This reverts commit c514b25aa3c1e8ed56b17fee00df2104d6251836.
build kernel from source
remove ion

Change-Id: I3e9f3367daeef044f423c8f5efcd96c6fe68ad75
Revert "Revert "remove releasetools""

don't customize this.

This reverts commit 0baf58a0779fbc0be3f55a6307da676422bbce63.
bring in vendor/cody
remove prebuilt zimage, modules

Change-Id: Id677b192b6f42b20be1259840d58ac1b2563b7de
remove readme

Change-Id: Ia6d04f17074a13ab1726e19b6b0849ea2c59f553