imageworks/OpenShadingLanguage — pull request #127 by lgritz (2012-04-18 00:29:19+00:00)
Title: Review: Spring Cleaning - namespaces, old version removal, etc.

* Make OSL_NAMESPACE_ENTER/EXIT macros and extensively replace clunky idioms with these.
* More cleanup related to the recent OIIO namespace alias.
* Remove support for very old OIIO < 0.10
* Remove support for LLVM 2.x (3.0 is current and 3.1 is going to release soon)