DOC: update markdown with QGIS instructions

README.md

@@ -60,6 +60,9 @@ Examples:
 None
 ```
 
+TimeSeriesIndexTrend can be used as any OTB application (gui, command line, python, c++, ...).
+To add the application in QGIS, just copy the file "_TimeSeriesIndexTrend.xml_" into the qgis/python/plugins/processing/algs/otb/description/5.0.0/ path.
+
 ## LandscapeFragmentation application
 
 ### Description
@@ -99,6 +102,9 @@ Examples:
 None
 ```
 
+LandscapeFragmentation can be used as any OTB application (gui, command line, python, c++, ...).
+To add the application in QGIS, just copy the file "_LandscapeFragmentation.xml_" into the qgis/python/plugins/processing/algs/otb/description/5.0.0/ path.
+
 ## License
 
 Please see the license for legal issues on the use of the software (CeCILL).