Add pandoc in requirement for doc compilation

setup.py

@@ -53,7 +53,8 @@ setup_dict = {'name': 'navipy',
                            'yaml',
                            'PIL',
                            'cv2',
-                           'fastdtw'],
+                           'fastdtw',
+                           'pandoc'],
               'install_requires': ["numpy",
                                    'pandas',
                                    'matplotlib',
@@ -70,7 +71,8 @@ setup_dict = {'name': 'navipy',
                                    'nbsphinx',
                                    'opencv-python',
                                    'coverage',
-                                   'fastdtw'],
+                                   'fastdtw',
+                                   'pandoc'],
               'package_data': {'navipy':
                                package_data_files("navipy")},
               'include_package_data': True,