Update zotero:// extensions (report, timeline, etc.) for async DB, and more

- Protocol handler extensions can now handle promises and can also make
  data available as it's ready instead of all at once (e.g., reports now
  output one entry at a time)
- zotero:// URL syntaxes are now more consistent and closer to the web
  API (old URLs should work, but some may currently be broken)

Also:

- Code to generate server API, currently available for testing via
  zotero://data URLs but eventually moving to HTTP -- zotero://data URLs match
  web API URLs, with a different prefix for the personal library (/library vs.
  /users/12345)
- Miscellaneous fixes to data objects

Under the hood:

- Extensions now return an AsyncChannel, which is an nsIChannel implementation
  that takes a promise-yielding generator that returns a string,
  nsIAsyncInputStream, or file that will be used for the channel's data
- New function Zotero.Utilities.Internal.getAsyncInputStream() takes a
  generator that yields either promises or strings and returns an async input
  stream filled with the yielded strings
- Zotero.Router parsers URLs and extract parameters
- Zotero.Item.toResponseJSON()

components/zotero-service.js

@@ -56,6 +56,7 @@ const xpcomFilesLocal = [
 	'libraryTreeView',
 	'collectionTreeView',
 	'annotate',
+	'api',
 	'attachments',
 	'cite',
 	'cookieSandbox',
@@ -89,6 +90,7 @@ const xpcomFilesLocal = [
 	'proxy',
 	'quickCopy',
 	'report',
+	'router',
 	'schema',
 	'search',
 	'server',