Add unit tests for ImageWriters
fix ssh key placement

Signed-off-by: rootfs <hchen@redhat.com>
restructure vagrant tree, make recipe lean, making easy to add new provider

Signed-off-by: rootfs <hchen@redhat.com>
review feedback

Signed-off-by: rootfs <hchen@redhat.com>
Incorporate review feedback
More review feedback
Added some more notes on getting S3 working
Merge pull request #525 from dcrankshaw/edit_docs

Added some more notes on getting S3 working
tweak docs
Merge pull request #524 from rootfs/vagrant-reorg

restructure Vagrant, making recipe lean and easy to augment
tweak deployment document
Merge pull request #523 from viksree/master

[TACHYON-12] Add unit tests for ImageWriters