Makes sure there are no unsaved files

hashfree.py

def hashfree(input_dir):
    """Makes sure---before we start doing lots of intense computations---that
       there are not any files w/ hash in front of them (which the shutil utility
       cannot copy for some reason) """
    no_bad_files = True 
    bad_files = []
    for root, subFolders, files in os.walk(input_dir):
        for f in files:
            if re.search('\.#.*', f):
                no_bad_files = False
                bad_files.append(f)                
    return (no_bad_files, bad_files)