- Rename some methods more appropriate
- Move some methods to more appropriate places
- Dont emit GTK events to signal GTK, use GLib.idle_add
- Remove option to set the plugin repo URL, use global vars instead

- Move UI code to glade file
- Remove use of deprecated widgets
- Rename some widgets

- Remove Server URL entry field
- Dont use deprecated widgets anymore

This inlcudes slight refactoring and switch to https instead of ftps

Certificate is only on python >= 3.4 verified

added ability to do periodic plugin update checks (every 24 hours) and resized window to fit omemo plugin name properly

PluginInstallerPlugin.fix gtk warning(gdk_window_invalidate_rect_full: assertion `GDK_IS_WINDOW (window)' failed)

create one ConfigParser instance per file so old values ore not used if current manifest has missing fields. Check that manifest file is full