flatpak and flatpak-builder 0.99.3 releases.

flatpak 0.99.3:

• Fixed case where system install would sometimes fail due to the system-helper idle exiting.
• Support installing flatpakref files in FlatpakTransaction, including a new signal add-new-remote for when remotes might be added.
• Added some new FlatpakError codes.
• We now support .flatpakrepo files with no gpg signatures
• Fix crash in system-helper when updating appstream
• New command create-usb which can be used to prepare an repo for offline updates.
• Fix some non-handled cases of the CLI not working when /var/lib/flatpak doesn't exist.
• Fix crash when running with a gid that is not in /etc/groups.
• Add new permission-* commands to interact with the permissions store from the portals.
• Include appdata in OCI bundle.

flatpak-builder 0.99.3:

• Add X-Flatpak-RenamedFrom key to renamed desktop files
• Set FLATPAK_BUILDER_BUILDDIR when building module
• Handle large downloads better
• Make p2p code non-optional