Remove unneeded include
Add missing variables to Loot copy ctor
MenuInventory: Reduce scope of variable found_slot
Tooltipdata: Use init list instead of instructions in ctor
Some small astyle fixes
Merge pull request #1003 from stefanbeller/cleanups2

small cleanups
Prepare for sfx refactor
Add level up sound path to StatBlock
Deprecate the use of sfx_prefix and make Avatar sounds configurable

Avatar sound configuration is done in `engine/avatar/$GFX_BASE.txt`
Allow modding footstep sound effects

Footsteps are configured in `items/step_sounds.txt`
Merge pull request #1005 from dorkster/sounds

Remove sound effect hard-coding
Merge remote-tracking branch 'upstream/master' into book_patch
Remove triggering books via events