coreos-kernel: bump to 3.16.1
etcd: drop [Install] section from unit
fleet: drop [Install] section from unit
coreos-kernel: roll back to previous 3.15.8 kernel

The new kernel completely failed to boot on EC2 as a Xen PV instance.
Rolling back until we figure out what is going on.

Boot log: https://gist.github.com/marineam/50f92ded40e02c163c19
fleet: add fleet.socket
coreos-base/coreos: remove syslinux installer from images

Installing the syslinux package is only required for re-installing
syslinux which has never really been needed and we will be moving to
grub soon anyway. This saves a 5-10MB in our final images.
coreos-kernel: roll forward to 3.16 again, minus KASLR

Our Xen boot failure appears to be related to enabling KASLR and
helpuflly the 'nokaslr' command line option does not help. Disable the
feature entirely until the bugs are shaken out.
exoscale support for CoreOS
typo in file path
added network fix