Various minor cleanups and fixes (#938)

* Documentation fixes

* Various docstring and help string fixes

* Minor code cleanups

* Removed redundant .gitignore entry, ignored package-lock.json.
* 'return' statement in certificates.service.render was redundant
* Split up too long line
* Non-matching tags in templates

lemur/default.conf.py

@@ -9,7 +9,7 @@ THREADS_PER_PAGE = 8
 
 # These will need to be set to `True` if you are developing locally
 CORS = False
-debug = False
+DEBUG = False
 
 # Logging