More icons. At last!
made document data available to filter parser
implemented use of predefined filters
added filter text column to filter table
allow colons in names (filter)
Adding .directory to gitignore.
Delete .directory
Fix an item duplication glitch
Various fixes
Chargen updates
Fix an AABB assert for loading empty exterior cells
Don't crash when trying to delete a reference that doesn't exist anymore
Use the non-accumulation root's parent as the accumulation root

This relies on the non-accumulation root not being the skeleton root. I haven't
found an instance where this isn't the case.
Use a smaller static geometry size for interior cells
Fix actor stepping
Remove unused functions and parameters
Merge remote-tracking branch 'scrawl/master'
Merge remote-tracking branch 'kcat/misc-cleanup'
Added alternative book icon in scalable folder. No raster just yet. I'm not sure if it will replace old icon.
Merge branch 'icons-svg' of https://github.com/sirherrbatka/openmw into icons-svg