Fix Matrix4.fromTranslation to return defined matrix in externs
Fix Matrix3.fromQuaternion to take additional parameter in externs
Add missing externs enableInputs and perVertexPosition
Fix feature change regression
Fix and add comment to dragbox example
Add comment to vector example
Add comment to selection example
Add Camera.setTransform to Cesium externs
Merge pull request #121 from gberaudo/examples_fixes

Examples fixes