Added new mod called "DoomBotsDifficulties"

This mod allows you to play Every difficultie of Doom Bots / Nightmare Bots.
it will show like this:

Doom Bots -> 5v5 -> Horror
                                  Horror
                                  Horror

(ex.: 
Doom Bots -> 5v5 -> Horror (difficulty 1)
                                  Horror (difficutly 2)
                                  Horror (difficulty 3) )