Fix timezone issues; add user-friendly due date entry; add client-side auto-update to the table fields

Closes #15 and makes the UI for making and viewing task info quite a bit nicer.

src/dependencies.md

@@ -9,6 +9,8 @@
 - humanize (for generating human-readable timedeltas)
 - nh3 (for markdown and general HTML sanitization)
 - scour (for SVG icon processing)
+- requests
+- markdown
 
 ## Already Included
 - Certain tag definitions from bleach-allowlist, used in markdown sanitization.