[libpeas] (25 commits) Created branch proxys

[Steve Frécinaux <sfre src gnome org>]

The branch 'proxys' was created.

Summary of new commits:

  dda12aa... Add PeasExtension
  b4982be... Add PeasExtensionC for extensions written in C.
  290d781... Proper GIRepository setup for peas-demo.
  5ff8d4d... Use PeasExtension for PeasUIConfigurable in PeasUIPluginMan
  7485a73... Add a way to know if a plugin provides a certain extension.
  a5609b2... Circumvent a warning due to _POSIX_C_SOURCE being defined t
  fa9c32f... Move GI-based C method invocation from C loader to libpeas.
  fa233cd... Do not make plugin_loader_load return a special object.
  bb06797... Split PeasActivatable out of PeasPlugin.
  d3cd519... Implement PeasExtensionPython
  55bb19e... Port hello world plugin to PeasActivatable
  bf2a262... Introduce PeasExtensionSet.
  81539c9... Update peas-demo to use PeasActivatable.
  f4fe840... [PeasObjectModule] Do not allow changing the symbol names.
  8f60246... [PeasEngine] make provides_extension() handle inactive plug
  8dcea1a... [PeasObjectModule] Introduce peas_object_module_register_ex
  76c1105... Drop old object definition macros.
  58edc3a... [Python] Drop existing bindings.
  08158b9... Simplify gobject-introspection-related bits in configure.ac
  0a35388... Update configure.ac code for Python detection.
  9a9709b... [Python] Update the loader's type registration code.
  ef12d29... [Python] Port loader to PyGI
  6efcf4a... New function peas_method_get_info().
  cc2b2a8... [Seed] Revamp Seed loader for PeasExtension support.
  3e95c95... WIP Add out args support in Seed plugins