Structure manipulation

Contents:

• clist_append
• clist_compare
• clist_difference
• clist_index
• clist_length
• clist_ones
• clist_permutation
• clist_slice
• clist_unique
• clist_unquote
• list_append
• list_apply
• list_compare
• list_count
• list_difference
• list_find
• list_index
• list_intersection
• list_length
• express_comparison
• list_ones
• list_permutation
• list_quote
• list_remove
• list_replace
• list_sequence
• list_slice
• list_sort
• list_unique
• str_to_keyvalue
• str_type