modified the xcode workspace and new project addition.

The workspace update is for isolate all project, now the developer need to compile by hand
all the referenced library for the project (ex CUTest ned chaos common and cu_toolkit that need to be
compiled by hand). This permit to imporve speed during xcode development debug sessione for compilation.
New project is the Benchtest simulation cod to test chaos installation

Change-Id: I2ad191b4e5c6b68b62ce07c163841ddfa2228b08