Prepare for 1.0 release (#1330)

CONTRIBUTING.md

@@ -1,32 +1,8 @@
-# dav1d contribution guide
+# rav1d contribution guide
 
 ## CoC
-The [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies fully to this project.
 
-## ToDo
-
-The todo list can be found [on the wiki](https://code.videolan.org/videolan/dav1d/wikis/task-list).
-
-## Codebase language
-
-The codebase is developed with the following assumptions:
-
-For the library:
-- C language with C99 version, without the VLA or the Complex (*\_\_STDC_NO_COMPLEX__*) features, and without compiler extensions. Anonymous structures and unions are the only allowed compiler extensions for internal code.
-- x86 asm in .asm files, using the NASM syntax,
-- arm/arm64 in .S files, using the GAS syntax limited to subset llvm 5.0's internal assembler supports,
-- no C++ is allowed, whatever the version.
-
-For the tools and utils:
-- C *(see above for restrictions)*
-- Rust
-- C++ is only allowed for the MFT.
-
-If you want to use *Threads* or *Atomic* features, please conform to the **C11**/**POSIX** semantic and use a wrapper for older compilers/platforms *(like done in VLC)*.
-
-Please use modern standard POSIX functions *(strscpy, asprintf, tdestroy)*, and provide a compatibility fallback *(like done in VLC)*.
-
-We will make reasonable efforts for compilers that are a bit older, but we won't support gcc 3 or MSVC 2012.
+While the rav1d Rust port is not a VideoLAN project, the [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies to contributions to this project.
 
 ## Authorship