Proper routing. blobs for blobs, raw for send_data

app/controllers/blob_controller.rb

app/controllers/raw_controller.rb

app/helpers/tree_helper.rb

app/views/blob/_actions.html.haml

app/views/blob/_blob.html.haml

app/views/blob/_download.html.haml

app/views/blob/_image.html.haml

app/views/blob/_text.html.haml

app/views/blob/show.html.haml

app/views/blob/show.js.haml

app/views/tree/_blob.html.haml

app/views/tree/_blob_item.html.haml

app/views/tree/_tree.html.haml

config/routes.rb

lib/gitlab/git/blob.rb