*Minor changes to includes for escortAI and followerAI
*Add function AssistPlayerInCombat() for escortAI and followerAI. m_creature will then assist a player being attacked by another creature, if escort/follow is active.
*Prepare escortAI for conversion to use escort states similar to followerAI. Add functions needed and also move some 'system-only' functions to private:
*Convert escortAI to use escort states instead of explicit boolean variable for each different state.
Scripts updated accordingly and obsolete variables removed.
*Small cleanup in escortAI log messages.
--HG--
branch : trunk
Kudlaty
e113939587