[enh] infinite scroll

resolves #649

searx/plugins/__init__.py

@@ -21,6 +21,7 @@ logger = logger.getChild('plugins')
 
 from searx.plugins import (doai_rewrite,
                            https_rewrite,
+                           infinite_scroll,
                            open_results_on_new_tab,
                            self_info,
                            search_on_category_select,
@@ -76,6 +77,7 @@ class PluginStore():
 plugins = PluginStore()
 plugins.register(doai_rewrite)
 plugins.register(https_rewrite)
+plugins.register(infinite_scroll)
 plugins.register(open_results_on_new_tab)
 plugins.register(self_info)
 plugins.register(search_on_category_select)

searx/plugins/infinite_scroll.py

@@ -0,0 +1,8 @@
+from flask_babel import gettext
+
+name = gettext('Infinite scroll')
+description = gettext('Automatically load next page when scrolling to bottom of current page')
+default_on = False
+
+js_dependencies = ('plugins/js/infinite_scroll.js',)
+css_dependencies = ('plugins/css/infinite_scroll.css',)