[gnome-calculator] (11 commits) ...Merge branch 'master' into wip/currency-conversion-plugins

[Robert Roth <robertroth src gnome org>]

Summary of changes:

  673b67e... Refactor currency management into currency providers (refs  (*)
  1f66efb... Merge branch 'master' into wip/currency-conversion-plugins (*)
  38fb887... Added support for sync and async currency loading (*)
  6385d4d... Merge branch 'master' into wip/currency-conversion-plugins (*)
  a343f06... Merge branch 'wip/async-currency' into wip/currency-convers (*)
  aecf053... Use async provider downloads by default (*)
  5beed7c... Make command-line conversions work (fixes #33) (*)
  efd6631... Added basic currency test (*)
  43c4d44... Added currency-provider tests (*)
  b8eede7... Added imf currency provider test (*)
  e91fda8... Merge branch 'master' into wip/currency-conversion-plugins (*)

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