Add offline mode
ReadCube needs an offline mode for when an internet connection is unavailable (it happens) or if a user just wants to use it offline. This is a vital feature for students and researchers alike.
When the library is hosted with all pdf files on my system, it would be very much appropriate to have a offline version. At times, there are internet connection problems and it is very frustrating to see readcube does not work. This prevents the smooth integrity of incorporating readcube references to word documents.