* Added support to build images with the serial line as the console

* Added support to build images with the serial line as the console

* Added support to build cramfs based images, which lets one install
  on memory constrained systems.  These are only built when the -a
  flag

* Intermediate images are now built in /data (if available), rather
  than in /tmp.  The reason being that /tmp within a chroot'ed myplc
  environment does not have sufficient space.  Falls back to using
  /tmp if /data is not available

* Made build.sh be backwards compatible with an RC1 based MyPLC
  installations.