Merge branch '3d-file-viewer' into 'master'

app/assets/javascripts/blob/3d_viewer/index.js

app/assets/javascripts/blob/3d_viewer/mesh_object.js

app/assets/javascripts/blob/stl_viewer.js

app/assets/stylesheets/framework/files.scss

app/models/blob.rb

app/views/projects/blob/_stl.html.haml

config/webpack.config.js

package.json

spec/javascripts/blob/3d_viewer/mesh_object_spec.js

spec/models/blob_spec.rb

yarn.lock