[epiphany] (11 commits) ...Keep sharing safe browsing data in default cache dir

[Michael Catanzaro <mcatanzaro src gnome org>]

Summary of changes:

  adfd872... Store web extension settings in a keyfile (*)
  b89cfd9... Migrate web app profiles into their own toplevel directorie (*)
  bdde497... Move adblock and safe-browsing data to cache dir (*)
  8ce8eff... Consistently use ephy_cache_dir() everywhere (*)
  3ff7fb6... Move profile directories to data dir (*)
  93e29d8... migrator: Use warnings on errors (*)
  f44e87e... Rename ephy_dot_dir() to ephy_profile_dir() (*)
  dd73a2a... Fix web app tests (*)
  4a16af4... Store web extension settings in config dir (*)
  f782f12... Fix setting cache/config dir for custom (non-webapp) profil (*)
  314ba86... Keep sharing safe browsing data in default cache dir (*)

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