add README and Makefile

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
cdecl: formatting and comment improvements

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
cdecl: fix token initialization

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
cdecl: support for variadic functions

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>