- added new backgrounds to mercs
- <no_male> and <no_female> prohibit specific backgrounds to show up on IMP generation
- <cth_vs_creatures> modifies gun CTH when aiming at creatures
git-svn-id: https://ja2svn.mooo.com/source/ja2_v1.13_data@1754 4f8fa57e-7814-0410-bad4-adc449f26b7c