Add support for mods with 'unshifted' item IDs (immibis)
Filter ItemBlocks - they're resolved as blocks, not items
Exclude comments when editing configs

Prevents finding our own IDs when editing
Exclude already-edited lines from editing

Fixes editing another item to an ID to an ID we already edited..
clobbering our own edits. Was seeing this with Forestry since the
default IDs and FTB ids were only slightly offset.
Cleanup some debugging
Ignore .txt
Add wanted mods list (include.txt) for which mods to include in modresolve.py