Fix #607

MANIFEST.in

@@ -1,6 +1,7 @@
 include README.md
 include LICENSE.txt
 include requirements.*.txt
+include requirements.txt
 include TTS/VERSION
 recursive-include TTS *.json
 recursive-include TTS *.html

Makefile

@@ -34,6 +34,9 @@ dev-deps:  ## install development deps
 doc-deps:  ## install docs dependencies
 	pip install -r docs/requirements.txt
 
+build-docs: ## build the docs
+	cd docs && make clean && make build
+
 hub-deps:  ## install deps for torch hub use
 	pip install -r requirements.hub.txt