Enhancements and new features:

* New export plugin: standard and configurable Restfull exporter (issue #1129)
* Add a JSON export module (issue #1130)
* [WIP] Refactoring of the WebUI

Bugs corrected:

* Installing GPU plugin crashes entire Glances (issue #1102)
* Potential memory leak in Windows WebUI (issue #1056)
* glances_network `OSError: [Errno 19] No such device` (issue #1106)
* GPU plugin. <class 'TypeError'>: ... not JSON serializable"> (issue #1112)
* PermissionError on macOS (issue #1120)
* Cant move up or down in glances --browser (issue #1113)
* Unable to give aliases to or hide network interfaces and disks (issue #1126)
* `UnicodeDecodeError` on mountpoints with non-breaking spaces (issue #1128)

Installation:

* Create a Snap of Glances (issue #1101)