[setup.py] Update setup.py to install Cmake lib in python env by default.

Update setup.py to install Cmake lib in python env by default following PEP405.

README.md

@@ -14,9 +14,11 @@ So far be sure to have the correct requirements to use this library
 
 ## Pip installation
 
-You will need to install first the aidge_core library before installing aidge_cpu.
-Also, make sure that the install path was set before installing aidge_core library.
-Then run in your python environnement : 
+You will need to install first the ``aidge_core`` library before installing ``aidge_backend_cpu``.
+
+If you have set a custom install path for the ``aidge_core`` library, make sure to use the same one here.
+
+Then run in your python environnement :
 ``` bash
 pip install . -v
 ```
@@ -46,4 +48,4 @@ Important: this command can also be run with `make`.
 To compile the CPU library with the python binding + the associated unitary tests, run
 ```
 make cpu_with_pybind_tests
-```
\ No newline at end of file
+```