Update README.md

Author: mauroalberti

README.md

@@ -6,5 +6,6 @@ Currently, it can:
  - calculate the angles between planes stored in a layer and a reference plane
  - plot data from layers or texts in stereonets
 
-These two tools are available from the QGIS plugin interface
+These two tools are available from the QGIS plugin interface.
+
 See help in installed plugin for further details.