cookbook: split dabba recipe from dev-env recipe.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
cookbook: set proper $HOME for dotfiles install.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
vagrant: add 'dev-env' cookbook to Vagrantfile.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
cookbook: install tmux during dev-env provisioning.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
vagrant: set dev vm host name properly.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
cookbook: use ssh access to checkout code.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
vagrant: forward ssh agent from host to guest.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>