lets tell the user how to dd the iso to a device
Merge pull request #30 from SvenDowideit/add-dd-instructions

lets tell the user how to dd the iso to a device
make the build example more obvious, and add the dd step - if someone is following the instructions they'll expect the entire thing to flow
Merge pull request #37 from SvenDowideit/readme-build-example-tweaks

make the build example more obvious, and add the dd step - if someone is following the instructions they'll expect the entire thing to flow