fixed an issue when using a single geometry in multiple scenes caused the loader to crash
changed the previous to completely avoid duplicating geometries
fixed to not use deprecated matrix timeline classes
refactor and remove dead code
fix animations without input/output data with a log message and avoid creating empty timelines
refactor to support extra (rendering) techniques, including the OpenCOLLADA3dsMax profile
add specular/shininess to PhongTechnique, but setting multipliers instead of actual replacement values: minko lighting engine should be fixed :(
fixed the issue where _diffuse and _specular were, sometimes, not set and caused the parser to crash
shininess property is not set if not found
add log error message when a broken image reference is encountered