fx_codec/ directory is a mess

[GoogleCodeExporter]

We should segregate the FX-written code from the third-party code, using the 
third_party directory.  

We can apply less restrictive warnings to remove some compile noise from the 
third_party contributions.

We can eliminate a bunch of fx_foo.c files that do nothing but #include 
"some_path/foo.c"

We can hoist the fx_codec/codec directory directly into fx_codec, as the other 
directories will have all moved to third_party.

Original issue reported on code.google.com by tsepez@chromium.org on 4 Jun 2015 at 7:26

[GoogleCodeExporter]

Ditto for agg under fxge.

Original comment by tsepez@chromium.org on 4 Jun 2015 at 7:31

[GoogleCodeExporter]

Done.

Original comment by tsepez@chromium.org on 30 Jun 2015 at 10:33

• Changed state: Fixed