Gowut v1.1.1 public release

Changes and new features in v1.1.1:

-Improvement: HTTP request and response writers are now exposed with Events. See issue #19.
Not directly, but they are available after a type assertion. See HasRequestResponse type.

-Fix: when something was selected in a ListBox, it was impossible to deselect everything from the UI. See issue #20.

-Fix: open web page with xdg-open in linux

-Other minor changes, improvements and optimization.