buffer.

* modules/mux/mpeg/ts.c:
  - rename the caching= option into shaping= since it more adequately
    describes what it does
  - new use-key-frames option, if enabled then shaping= will be a
    maximum value, if the algorithm find a new GOP it will finish with
    the first picture of the next GOP (helps minimizing the dts delay)
  - fixed a bug where the calculated sending time could be later than
    the real DTS time (meaning the decoder wouldn't get the buffer
    in time)

- On the playlist window, turn loop/repeat/standard play selection into a popup
- On the playlist window : if more than one group is defined, coolorize items according to the group they are belonging to. Currently, 8 colors are hard coded

Please make remarks on the new layout / the colors chosen.

  - use AV_NOPTS_VALUE instead of 0 when it's available
  - reworked the hurry-up mode to start with disabling the B frames first
  - reworked the hurry-up mode to remove my thread mess
  - check that we don't feed ffmpeg with twice the same PTS (crashes ffmpeg)
  - correctly flag the picture types

* modules/stream_out/transcode.c:
  - use AV_NOPTS_VALUE instead of 0 when it's available
  - copy block_t::i_flags to sout_buffer_t::i_flags (temporary)

  - split transrate.c
  - you can specify a maximum gop length on which to perform transrating,
    to avoid adding to much delay in the sout pipeline (shaping= option)
  - fixed a bug where you couldn't transrate a transcoded stream

  (temporary).

  block_t::i_flags.

  packets at once (less scheduling overhead) ; typically access=udp{group=5}
  will send 5 * 7 TS packets at once.

  (because others do it - no idea if it helps, though)

  - fixed the infamous "libmad is twice slower" bug
  - fixed libmad dynamic build
  - added a52 support to ffmpeg
  - remove libdvdnav

 - skins2/theme/skin.dtd: Removed Event and Rectangle tags
 - skins2/src/theme.cpp: Destroy curves explicitely
 - ALL: Anchors can be defined using a Bezier curve, which allows
   rectilinear anchors (but it is still possible to define anchors
   reduced to a single point).
   A "curved anchor" only attracts "single point anchors"

  libmodplug working now. apparently it didn't like dynamic linking on OS X.

* po/de.po: removed my reminders
* modules/demux/mkv.cpp: disabled translation of the string "Matroska"

* src/libvlc.h: small corrections of to-be-localised strings
* modules/gui/macosx/macosx.m: ditto
* modules/video_output/fb.c: ditto

 than just the "SMI " one).

* ChangeLog: updated for 0.7.1.

* modules/gui/skins2/Modules.am: oops, 1 file too much.

* po/*: ./toolbox --update-po in preparation for the release.

* modules/gui/skins2/src/skin_main.cpp: default skin is skins2/default/theme.xml.

* modules/gui/skins2/Modules.am: include the default skins2 theme in the "make dist" rule.
* install-win32, Makefile.am: include the default skins2 theme in the win32 package.

 in the xml parser instead of the builder: fixes nasty bugs related
 to layout IDs
* theme/skin.dtd: "id" attribute is no longer required for window

* modules/gui/wxwindows/*: make sure we re-use the streaming wizard so the user selection doesn't get lost each time it is opened.

* modules/demux/mkv.cpp: fixed copy&paste bug.

   + lower a bit the input thread priority on win32 (using THREAD_PRIORITY_ABOVE_NORMAL now).
* modules/access/file.c:
   + s/config_GetInt()/var_Get() for file-caching.
* modules/access_output/udp.c:
   + less verbose debug messages.
   + increase thread priority on win32.

Actually, we still got some (huge) untranslated strings in libvlc.h,
I'll care about them after the release.

* configure.ac: fixed --with-dts-tree.

* NEWS: updated.

* modules/demux/rawdv.c: DV audio support was removed from libavcodec so reimplemented it here.