updates to BLOCKHEAD/BLOCKTAIL naming to match nullclick naming

change to custom list name

 base.list to match master
correct to custom list name
install and removal messages
move initialize_list() to install_list()
 moved domain validity check closure to use
 move multiple loops to list compression or generator
 underscores in  file descriptor names  in with open
 add bool returns remove_list()
 clean up and compress push_site()
   handle empty object pass
   add validity check in add_sites()
   l
update retrieval message
remind use update does not imply install
change list print to display as zeroeth + 1