Remove Cloud Dependencies and Bug fixes

I have been trying to keep the package simple, easy to use and less dependable. So in this release, I removed cloud dependencies and related classes and methods. For using clouds such as Amazon S3, Google Cloud and etc, please visit the following links:

Opening a file from a cloud: https://video.aminyazdanpanah.com/start/open-clouds
Saving files to a cloud: https://video.aminyazdanpanah.com/start/save-clouds

Also, bug fixes bug #27 and other minor performance enhancements