Add a lua-capnp powered compiler: capnpc-llua. Need more effort to make it work.
Update TODO
Add support for composite list values(type 7) to handwritten_capnp.lua
Add support for parsing composite tag to handwritten_capnp.lua
Add test cases of group within union for handwritten_capnp.lua
Add a test case of list of structs for handwritten_capnp.lua
Add list of structs support for the compiler. And also add a test file for compiler generated code.
Add missing schema encoding/decoding lua file used by bin/capnpc-llua