v2.8.1

v2.8.1 (2018-02-15)

• Add n-gltf loaded event, bounding box (53df5eb)
• Cache getBounds result, add spec-gloss to example (9ad8b7f)
• Merge branch 'feature/native-gltf-component' (654429d)
• Updated in light of native components update (9517e78)
• Version bump 2.8.1 (b89eb72)