[gnome-software/wip/iainl/ubuntu-xenial] (26 commits) ...Don't dump libapt's error logs

[William Hua <williamhua src gnome org>]

Summary of changes:

  a28576a... Remove empty signal handler (*)
  a32fffe... Use a common schema (*)
  425263d... Split out snapd-specific utilities (*)
  3a234c6... Add show_status () helper function (*)
  3561910... Add gs_ubuntuone_get_macaroon () (*)
  4c1094a... Simplify U1 request call (*)
  bfa5595... Add reenable_widgets () (*)
  4e55ac5... Add snapd support to login dialog (*)
  13e6ced... Authenticate if needed (*)
  d2145e9... Fix parsing of snapd response (*)
  d587c62... Connect to socket every request (*)
  aa05146... Close the socket before trying to re-authenticate (*)
  97ba836... Don't show error message on success (*)
  967ba24... Add NUL terminator to end of string (*)
  3431826... Check snaps for "available" status (*)
  ff93560... Only store macaroon when requested (*)
  5a90cf3... Add gs_ubuntuone_clear_macaroon () (*)
  d63fb5e... Set error on failure (*)
  d0f2523... Don't depend on remembering the macaroon (*)
  2ff4e21... Disable the Launch button for snappy apps (*)
  ac3a1c4... Use changes endpoint from snapd (*)
  f32021c... Keep macaroon so that progress updates don't prompt all the (*)
  25c258d... Free leaked strings (*)
  45250f5... Memory leak fix (*)
  ec977b1... Free PackageInfo name (*)
  a3ed964... Don't dump libapt's error logs (*)

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