Remove e.erl

* Not really used other than from initgame.txt
erltrek_game.erl: remove non-galaxy-server code

* Add a skeleton handle_info/2 doing nothing

* Add srscan/0 as a shorthand for initialization of the game

* Remove handle_call({enterprise_command,...})

* Remove handle_call({handle_info({tick_event,...})
initgame.txt: use -s for -run, erltrek_game:srscan/0
erltrek_ship.erl: add TODO comments in handle_info

* phaser_hit message should be handled on the ship side
Use 'TODO' for all to-do comments

* For syntax highlighting on vim of the capitalized TODO