Adding dump_ssim and dump_fastssim tools.
Fix description of SSIM dB.

The actual calculation was correct (SSIM is weighted MSE, and thus
 already squared), but the help text was wrong.
Upgrade check dependency.

We don't work with 0.9.5.
Provisionally requiring at least 0.9.8, which does work.
configure: Allow the example player to be disabled

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Fixing typo in RD-graphs.
Updated rd_collect.sh to fix usability issues.

Added $BASHPID to the $TMP_DIR so you can execute multiple runs
 concurrently.
Script now makes use of dump_ssim and dump_fastssim tools from the
 daala git repo.
Added test for required --enable-logging configure flag.
Aligning the quantized gain with the gain of the reference in new theta PVQ
Add hunk missing from commit a8ef9a64.

Because I fail at git.
Fix some unused variable warnings.

One of these was a real (but harmless) mistake.
The others were only used in certain non-default configurations.
Control these with explicit, named #defines now.
Thanks to Sean Silva for the report.
Minor whitespace fixes.
Double precision theta pvq: fixes reference gain and outputs gain/angle info
Fix whitespace damage

And a "nested" /* comment, that was actually unpaired.
Switch to using config.h for configuration options

The main motivation for this is it ensures the files will actually be
rebuilt if the configuration options are changed.

Add a description to the OD_X86ASM define, since autoheader barfs and
dies when generating config.h.in without one.
Write metrics.json with bitrate metrics when --enable-metrics is given.
Add webtools with metrics tool for graphing bit spend.
Fix comment.
Fix warnings about variadic macros.
Split y4m and theora readers into separate files. r=derf

Duplicates the th_info and th_ycbcr_buffer structures
in vidinput.h since we don't want everything to depend
on libtheora.
Remove theora video loader. r=derf,gmaxwell

A number of the tools can work directly on theora video. This was
convenient when they were being used to develop libtheora, but in
daala they're mostly an extra dependency which slows down people
trying out the code.
double precision pvq tuning