New version 28.18-1
    
    - Move how to use setup-mock-test-env script to help (jkonecny)
    - Add --init as new parameter to setup-mock-test-env (jkonecny)
    - Initialize the thread manager at the first import. (vponcova)
    - Added tests for the timezone module and other. (vponcova)
    - Remove 'i' from iutil module (jkonecny)
    - Remove 'i' from isignal module (jkonecny)
    - Move isignal module to core/isignal (jkonecny)
    - Extract process watch functions to a static class (jkonecny)
    - Move regexes module to core/regexes (jkonecny)
    - Move i18n module to core/i18n (jkonecny)
    - Move constants module to core/constants (jkonecny)
    - Move iutil module to core/iutil (jkonecny)
    - Move async_utils to core/async_utils (jkonecny)
    - Replace gobject GLib by our core/glib (jkonecny)
    - Rename run_in_main_thread to run_in_loop (jkonecny)
    - Add Timer and PidWatcher abstraction above GLib (jkonecny)
    - Create abstraction above GLib event loop (jkonecny)
    - Add core/glib module for GLib access (jkonecny)
    - Ignore errors for KickstartSpecificationHandler. (vponcova)
    - Try to use the PropertiesChanged signal. (vponcova)
    - Add timezone module. (vponcova)
    - Collect properties changes before emit. (vponcova)
    - Use Ping method from the standard interface. (vponcova)
    - Recognize members of standard interfaces. (vponcova)
    - Add an object observer with cached properties (vponcova)
    - Rename modules with Fedora install classes. (vponcova)
    - Add support for Variant in .buildstamp (vponcova)
    - Fix the Bar module. (vponcova)
    - Add pykickstart version to branching policy doc (jkonecny)
    - Remove `unstable` branch from documentation (jkonecny)
    - Move system-logos to anaconda-core (#1529239) (bcl)