Standardized usage of objective macros
E1S1: remove defeat objective. This is a non-battle scenario
Simplified filters
E1S3: added not-really-needed first_time_only=yes key to attack event
E1S4: some progress

The previous commit accidentally included some of this - the adding of objectives
Added [simplify_location_filter] from AtS
E1S4: added some code for Rhaen's scorp summoning
E1S3: little indent fix by wmlindnet
E1S4: bit more progress