New iberian helmets
Including updated versions of:
- iber_helmet_05
- iber_helmet_06
- iber_helmet_07
- iber_helmet_08
- iber_helmet_09
Updated actors:
*iberians/cavalry_javelinist_a_r.xml
*iberians/cavalry_javelinist_e_r.xml
*iberians/cavalry_javelinist_c_r.xml
*iberians/infantry_spearman_a.xml
*iberians/infantry_swordsman_a.xml
*iberians/infantry_swordsman_c.xml
*iberians/infantry_swordsman_e.xml
*carthaginians/infantry_spearman_e.xml