Alchemist running in one machine using two users

[slashmili]

When a vim session run Alchemist.vim for a given project, Alchemist.vim creates a directory in
/tmp/alchemist_server/ and keeps the PID of running ElixirSense for that project there.

The problem is if someone tries to open another session vim using different user, would get error like:

Traceback (most recent call last):
  File "./elixir_sense_client", line 81, in <module>
    main(sys.argv[1:])
  File "./elixir_sense_client", line 71, in main
    response = sense.process_command(request, source, line ,column)
  File "/Users/slashmili/.vim/plugged/alchemist.vim/elixir_sense.py", line 53, in process_command
    sock = self.__get_socket()
  File "/Users/slashmili/.vim/plugged/alchemist.vim/elixir_sense.py", line 79, in __get_socket
    self._run_alchemist_server(server_log)
  File "/Users/slashmili/.vim/plugged/alchemist.vim/elixir_sense.py", line 236, in _run_alchemist_server
    log_file = open(server_log, "w")
IOError: [Errno 13] Permission denied: '/tmp/alchemist_server/zS2UserszS2miladzS2.vimzS2pluggedzS2alchemist.vim'

We can include the current user id or name in the directory, for example:
user1: /tmp/alchemist_server_555/
user2: /tmp/alchemist_server_556/

BTW we can also change the name of directory from alchemist_server to elixir_sense

[slashmili]

Fixed