Revert "start ntp when net is started instead of early-network-time"

This reverts commit cc7de556e755a5b131be4d22c19c47e62040799f.
Revert "added original ntp.conf"

This reverts commit cca3bde5eb01fabcc4fb3dbac0367b4f7ae17b11.
Revert "run wired at startup"

This reverts commit 78d28e192979042062396259f886a60f2192927a.
dont remove network manager
stop execution if one command fails
dont apt-get upgrade

raspbmc uses special versions of certain packages to make them work with upstart instead of sysvinit
AAND they dont properly manage the repo or pin the correct versions or anything, they just say dont upgrade