Remove Cirno.sh and Makefile in preparation for a rewrite
Store friends in an ArrayList<>

In the middle of the night it dawned on me, while sleeping, that it
was stupid to use HashSet<> for storing a list of Cirno-9’s friends.
Realistically all we need is a list because we’re only doing simple
tests for membership and iteration.
Grant OP status to all of Cirno’s friends

This patch modifies Cirno9.onJoin() so that whenever a user enteres
the room, she will go through the list of current users, match that
against her internal list of friends (see Acquaintances.java),
granting them OP status if they do not already have it.
README: Remove the ‘LLC’ from the title, as it looks ugly
Remove Cirno.sh and Makefile in preparation for a rewrite
Add a very simple Makefile
Merge branch 'op-users-automatically'

* op-users-automatically:
  README: Remove the ‘LLC’ from the title, as it looks ugly
  Grant OP status to all of Cirno’s friends
  Store friends in an ArrayList<>
  Remove Cirno.sh and Makefile in preparation for a rewrite