Add JavaScript manager.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/common/management/commands/installjavascript.py

@@ -0,0 +1,13 @@
+from __future__ import unicode_literals
+
+from django.core import management
+
+from ...javascript import JSDependencyManager
+
+
+class Command(management.BaseCommand):
+    help = 'Install JavaScript dependencies.'
+
+    def handle(self, *args, **options):
+        js_manager = JSDependencyManager()
+        js_manager.install()