ENH : Add PythonAPI repertory in rst

doc_cookbook/rst/PythonAPI/pythonAPI.md

+# Python API (python_src/)
+
+## Description
+
+The python_src was organized with two packages : processings and utils. 
+
+The first one contains the main processings chains such as DInSAR, Ground or Pre_Processing. Utils package is a general module with a pool of useful functions and an API to launch OTB or DiapOTB applications from Python.
+
+
+Our four main scripts (SAR_MultiSlc.py, SAR_MultiSlc_IW.py, diapOTB.py and diapOTB_S1IW.py) use processing and utils modules with these following connexions :
+
+![image](../Art/PythonAPI/python_src.png)
+
+
+## Packages
+
+
+* [processings package](processings) 
+
+
+    * Submodules
+
+
+    * processings.DInSar module
+
+
+        * The `DINSAR` chain
+
+
+            * main function : gridToInterferogram
+
+
+    * processings.Ground module
+
+
+        * The `Ground` chain
+
+
+            * main function : demProjectionAndCartesianEstimation
+
+
+    * processings.Metadata_Correction module
+
+
+        * The `Metadata Correction` chain
+
+
+            * main function : metadataCorrection
+
+
+    * processings.Post_Processing module
+
+
+        * The `Post_Processing` chain
+
+
+            * main function : filtering
+
+
+    * processings.Pre_Processing module
+
+
+        * The `Pre_Processing` chain
+
+
+            * main function : extractToMultilook
+
+
+    * Module contents
+
+
+* [utils package](utils)
+
+
+    * Submodules
+
+    * utils.DiapOTB_applications module
+
+
+        * DiapOTB applications
+
+
+            * Applications list :
+
+
+    * utils.addGCP module
+
+
+        * addGCP.py
+
+
+    * utils.func_utils module
+
+
+        * func_utils module
+
+
+    * utils.generateConfigFile module
+
+
+        * generateConfigFile.py
+
+
+    * utils.getEOFFromESA module
+
+
+        * getEOFFromESA.py
+		
+		
+    * Module contents