Map cs_chemical for cs 1.6

'Chemical Reactions' Scientist Rescue Mission by [WTF?]Un_ethical Counter-Terrorists: Enter the research base and rescue the kidnapped scientists. Take out the Terrorists without jeopardizing the Scientists. Terrorists: Prevent Counter-Terrorist force from rescuing the Scientists. Other Notes: There are 5 Scientists to be saved in the mission. (Press FIRE to continue)