Created blackbox_cat: Decrypt a file, cat it, shred it
blackbox_shred_all_files now changes to root dir before running. Moved similar code from blackbox_postdeploy into _blackbox_common.sh as change_to_root function.
Made changes as per tlimoncelli
Merge pull request #31 from harrisonpage/master

Created blackbox_cat: Decrypt a file, cat it, shred it. Changed blackbox_shred_all_files to cd to root of repo before shredding.