Updated old and added new IMG extensions. (#90)

* Added IMG HTML extension files.

* Redirect previously published IMG extensions to their new HTML files.

* Added extension 66: cl_img_generate_mipmap.

* Added extension 67: cl_img_mem_properties.

* Updated clext.php with update IMG extensions.

* Alphabetise IMG extension ordering.

* Update txt versions of IMG extensions to signpost the HTML version.
10 files changed
tree: cbc1dca5e5f54a02cbbec59b221253470431fefe
  1. CODE_OF_CONDUCT.md
  2. README.adoc
  3. api/
  4. extensions/
  5. index.php
  6. sdk/
  7. specs/