0.9.2.5 released, many minor/major improvements

-Migrate to new check idle solution
-Remove any udev dependecies
-Improve notification window
-Increase statistic window update time in most cases
-Add total time counter in statistic window
-Add realtime statistic window update if window visible
-Migrate from QtScript to QJSEngine
-Add posibility to execute custom script as last step while tracking.
-Custom script not separate mode anymore
-Improve google chrome tracker extension - released in WebStore now
-Add trackers for Vivaldi/Opera/Yandex browsers
-Remove skype script(skype not showing nick in title anymore - script is useless)
-Fix MacOS crash
-Add portable mode