Initial check-in for demo 0

- Demo 0 consists only of a README file for utilizing basic commands
Updates demo 0 README

- Adds more information about QEMU monitor
Initial check-in for demo 1

- Adds basic scripts for running a QEMU Versatile Express machine
- Note, this assumes that qemu-system-arm is on the default path
Initial check-in for Demo 2

- Demo 2 shows off a basic qemu-img command and demonstrates how to
  work with a disk image
- Adds ignore files for ignoring binary files
Revamp of Demo 2

- Adds a couple more scripts for demonstrating different arguments to
  QEMU
- Adds a basic hello world program for running as the init process
- Assumes that arm-linux-gnueabi-gcc is the ARM cross compiler
Initial check-in for Demo 3

- Creates a basic root filesystem
- Scripts expect a statically compiled busybox as symbolic links are
  created for the root filesystem
- Introduces a few more QEMU parameters
Adds basic README for the qemu demo
Re-arranges demo files under workshop_1 directory