First pass at adding support for configurable bone influences
updated review.js to support cameras defined in a scene
updated the bone mapping logic to instead record the maps locally within the parsing method and not store to the Geometry() instance
included package modules missing from import
cleanup of unused imports and variables
Fixed the bone parent index to derive the index value from the bone mapping
Merge pull request #5556 from repsac/io_three

Allows up to 4 bone influences per mesh vertex