Major update v1

Improvements

• New upload method (Drag&Drop into file manager)
• AWS s3 support (No image dimensions) #6
• Preview of more file types:
  • PDF (native iframe, object)
  • Text
  • Zip
  • Audio
  • Videos
• Translations added (json) #10

Fixes

• Slash URL working #7
• Upload image JS Object #8
• Label error on editing #12
• UTF-8 characters #13
• Other fixes