Merge pull request #161 from SvenDowideit/simpler-defaults

Simpler defaults - and use ./boot2docker for iso and vmdk
Merge pull request #164 from SvenDowideit/pr/101

fix boot2docker.iso not using config variable
rootfs: add iproute2
Saved state and status update, credits to @rimusz, at #169
Merge pull request #167 from proppy/add-iproute2

rootfs: add iproute2
don't run ntpclient by default, force the user to configure it by setting NTP_SERVER