work on player: integrate vuejs + noscript; remove TemplateMixin for Component and ExposedData; rewrite most of the player; clean up files; do lot of other things

requirements.txt

@@ -1,13 +1,12 @@
 gunicorn>=19.6.0
-Django>=1.10.3
+Django>=1.10.3,<2.0
+wagtail>=1.5.3,<2.0
 django-taggit>=0.18.3
 watchdog>=0.8.3
 psutil>=5.0.1
 pyyaml>=3.12
 dateutils>=0.6.6
 bleach>=1.4.3
-django-htmlmin>=0.10.0
-wagtail>=1.5.3
 django-overextends>=0.4.2
 Pillow>=3.3.0
 django-modelcluster==2.0