- Created A3.{h,cpp} which will be a simpler, lightweight version of
Arguments.{h,cpp} that does less, but does it better.
- Created E9.{h,cpp} which will be a better implementation of
Expression.{h,cpp} that does less, but does it better.
- Integrated A3 into Context::initialize, and Arguments and A3 will
coexist until A3 surpasses Arguments.
