Consolidate frontend (home-assistant#9915)

* Consolidate frontend

* Remove home-assistant-polymer submodule

* Convert to using a pypi package for frontend

* fix release script

* Lint

* Remove unused file

* Remove frontend related scripts

* Move hass_frontend to frontend REQUIREMENTS

* Fix tests

* lint

* Address comments

* Lint + fix tests in py34

* Fix py34 tests again

* fix typo

Author: balloob

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "homeassistant/components/frontend/www_static/home-assistant-polymer"]
-	path = homeassistant/components/frontend/www_static/home-assistant-polymer
-	url = https://github.com/home-assistant/home-assistant-polymer.git

MANIFEST.in

@@ -1,5 +1,4 @@
 include README.rst
 include LICENSE.md
 graft homeassistant
-prune homeassistant/components/frontend/www_static/home-assistant-polymer
 recursive-exclude * *.py[co]