hype-rootfs: include new core-image-tpm.inc instead of .bb
hype-rootfs: delete /boot contents as it managed separately outside of readonly rootfs
grub.cfg: increase menu timeout to 10 seconds.
hype-installer: add basic support for upgrade vs. fresh install.
hype-rootfs: override default /etc/network/interfaces by appending init-ifupdown.
xen 4.3.0 recipe:
- fix python header for installed python scripts.
- populate volatiles so /var/{run,lock,log} bits get created correctly.
- included additional required dependencies: python (xm - still not complete) and perl (locking.sh).
- minor packages re-organization.