[ostree] (27 commits) Non-fast-forward update to branch wip/delta

[Colin Walters <walters src gnome org>]

The branch 'wip/delta' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 http://live.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  75db71e... core: Add code to read/write "varints"
  0170b97... core: Import bup's "rollsum" code, add a test case
  87527bc... WIP static deltas

Commits added to the branch:

  6bb4ea4... core: Add some more gtk-doc (*)
  a04bda1... core: Use gs_stream_fstat() (*)
  a00eb68... Install systemd units in the right location (*)
  5a4b7d7... configure: Use AS_IF() consistently (*)
  f9b2c45... Add 'ostree reset' command to undo a bad commit (*)
  17560a5... Add gtk-doc support (*)
  1ec7c30... core: Remove old "archive" mode (*)
  9c79b35... build: Fix the build without documentation (*)
  aecac2f... TODO: Tweak (*)
  349d795... Fix use of uninitialized memory in ostree_builtin_checksum( (*)
  c3121b5... libostree: Document more core macros (*)
  06d1a56... core: Drop duplicated type declarations (*)
  abe2320... libostree: Fix many gtk-doc warnings (*)
  75cd17d... docs: Add an overview section, migrate some content from th (*)
  0f9d7d2... libostree: More gtk-doc updates for ostree-core (*)
  1fea88e... libostree: Add gtk-doc section for ostree-repo.c (*)
  35d7b9c... libostree: Increase gtk-doc coverage of ostree-repo.[ch] (*)
  00c352b... libostree: Delete some leftover remnant API for archive fil (*)
  d1babde... Fix make distcheck (*)
  e5d9bd9... ostree init: Fix mode list help string (*)
  12ccbff... build: Fix and prettify build option output (*)
  5f90502... Release 2013.5 (*)
  eaee309... Use { 0, } for structure initialization rather than memset( (*)
  3d8c17a... repo: Fix object storage size API to be 64 bit
  0b4017d... core: Add code to read/write "varints"
  894a98c... core: Import bup's "rollsum" code, add a test case
  47ccde3... WIP static deltas

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