Introduct :auto mode for :file_staging_uses_destdir which tries the dest_dir first and falls back to tmpdir when unsuccessful.
Use platform_specific_path in chef shell
Fixes based on PR comments.
Dedicated error for content staging issues. Comment fixes in config.rb.
Merge pull request #2427 from opscode/jdmundrawala/path-sep-refactor

Use platform_specific_path in chef shell
Merge pull request #2424 from opscode/sersut/chef-2356

:auto mode for :file_staging_uses_destdir