Fix Laravel Upload Example UI #105

The Laravel Upload example can use some fixes:

• Move the Upload page to the Homepage, the Welcome page probably isn't needed
• Update the Upload UI to separate, with titles, selecting a file to upload and uploading using the Upload Widget ("Upload Files")
• Upon successful upload, show the uploaded asset in the UI instead of just the resulting URL
• To show the uploaded asset, use x-cld-video and x-cld-image depending on the filetype