Rename shared directory between host and container to "shared"

Signed-off-by: Gianpaolo Macario <gianpaolo_macario@mentor.com>
Add verbosity to script
Merge pull request #30 from gmacario/use-shared-dir

Rename shared directory between host and container to "shared"
Document building core-image-full-cmdline for wandboard-dual
README.md: Fix typo
Rename directory to build-yocto-fsl-arm
Add reference to subproject build-yocto-fsl-arm