flatpak 1.0.4 release.

• Flatpak 0.99.1 removed the inheritance of permissions from the runtime due to concerns with dynamic app permissions. Due to popular requests, this version re-introduces such inheritance, but does it instead at build time. This solved the issues with dynamic permissions while still allowing runtimes to have default permissions. Apps can disable this by passing --no-inherit-permissions to build-finish.
• The sandbox now always includes a /etc/timezone file, following the (old) debian standard for this. This is needed, because the more modern way of exposing the timezone name by having /etc/localtime be a symlink into /usr/share/zoneinfo doesn't work when exposing the host timezone.
• All apps now have automatic permissions to own their own app id as a subname of org.mpris.MediaPlayer2.
• We now properly re-load remote state in FlatpakTransaction if the metadata was updated for the remote.
• The signature of the FlatpakTransaction::operation-done signal was wrong in the header and has now been corrected to the signature that is actually emitted.
• A crash was fixed when reading invalid .flatpakref files.
• A crash during updates when a local ref was unexpectedly missing was fixed.
• An error case on uninstalling was incorrectly returning success even thought there was an error.
• flatpak_installation_modify_remote did not correctly save the nodeps state.
• flatpak_installation_load_app_overrides() was improperly returning freed memory.
• The tarball now ships with an icon (flatpak.png).