[ostree] Created tag v2015.6

[Colin Walters <walters src gnome org>]

The signed tag 'v2015.6' was created.

Tagger: Colin Walters <walters verbum org>
Date: Fri Apr 17 14:21:24 2015 -0400

    Release 2015.6
    
    ExtendedVerify-SHA256-archive-tar: c0f802e39ee060124812a642b40dbffd6beaabfa64e4d24d3d3fb57e2c6eeb61
    ExtendedVerify-git-version: git version 1.8.3.1

Changes since the last tag 'v2015.5':

Colin Walters (8):
      pull-metalink: Don't print error output when we expect failure
      Add an API to set/unset a deployment tree's mutability
      refs: Use *at for writes, honor repo fsync flag
      repo: Add a private helper to replace a file, honoring fsync policy
      libglnx: Update to latest
      reset: Don't enforce parent commits
      sysroot: Add ostree_sysroot_get_fd()
      Release 2015.6

Giuseppe Scrivano (4):
      ostree_repo_checkout_tree_at: remove @subpath documentation
      _ostree_repo_file_replace_contents: make buf const
      summary: write the contents to a temporary file
      config: add new parameter "commit-update-summary" to core section

Matthew Barnes (11):
      gpg: Add ostree_gpg_verify_result_describe()
      admin: Show GPG signatures in status command
      libglnx: Pick up file permission regression fix
      tests: Fix root uid check in test-commit-sign.sh
      repo: Improve error handling in sign_data()
      repo: Add a "gpg-verify-result" signal
      pull: Print GPG signature status as soon as its known
      repo: Add ostree_repo_remote_get_gpg_verify()
      admin: Conditionally show GPG signatures in status command
      sysroot: Cache an OstreeRepo instance
      main: Tweak GPG output to match rpm-ostree