[gedit] (17 commits) ...Remove -b/--background option

[Paolo Borelli <pborelli src gnome org>]

Summary of changes:

  e2c1dfb... Remove dbus and fifo (*)
  ccd7941... Initial port to GtkApplication (*)
  44acd77... Die smclient die
  b060f1e... Remove the now unused SAVING_SESSION window state
  96ef8de... Move command line handling to the GeditApp
  7cf53f7... Move more code to startup/shutdown
  4476179... Handle stdin
  a101107... Override startup in win32 implementation
  1666704... Kill app_ready.
  bf90a67... Remove gedit_applucation_get_default etc
  aba119a... Remove custom handling of the last active window
  8361e2a... Add startup notification timestamp hack
  8bc593f... Restore proper handling of workspaces
  05918e0... Use GtkApplication inhibit api
  137119e... Remove logout mode from the close-confirmation-dialog
  ee95e4c... Handle --wait
  85ad6b0... Remove -b/--background option

(*) This commit already existed in another branch; no separate mail sent