Corrected SDF example documentation to use CMSIS-DSP Python wrapper.

SDFTools/documentation/example1.md

@@ -26,11 +26,7 @@ Let's analyze the file `graph.py` in the `example1` folder. This file is describ
 First, we add some path so that the example can find the sdf packages when run from example1 folder.
 
 ```python
-import sys
-
-sys.path.append("../..")
-
-from sdf import *
+from cmsisdsp.sdf.scheduler import *
 ```
 
 

SDFTools/documentation/example3.md

@@ -103,12 +103,12 @@ This node is provided in sdf/nodes/cpp so no need to define it. You can just use
 It can be used by just doing in your AppNodes.h file :
 
 ```c++
-#include "CFFT_F32.h"
+#include "CFFT.h"
 ```
 
 From Python side it would be:
 
 ```python
-from sdf.nodes.py.CFFTF32 import *
+from cmsisdsp.sdf.nodes.CFFT import *
 ```
 

SDFTools/documentation/example4.md

@@ -30,7 +30,7 @@ This file is defining the new nodes which were used in `graph.py`. In `graph.py`
 In `appnodes.py` we including new kind of nodes for simulation purpose:
 
 ```python
-from sdf.nodes.py.CFFTF32 import *
+from cmsisdsp.sdf.nodes.CFFT import *
 ```