misc: don't import memory in launch script: launch script was importing a method from memory (fixLocalDir), but memory is importing twisted.internet.reactor which can result to a ReactorAlreadyInstalledError. This patch fixes it by moving fixLocalDir to tools/config. The launch script is now using /usr/bin/env.

You'll find install instructions in documentation (see doc/installation.rst).

If you need help, come the SàT official XMPP room: sat@chat.jabberfr.org or join us with a web browser via https://chat.jabberfr.org/converse.js/sat@chat.jabberfr.org