v0.8.4

Version 0.8.4

Changes since 0.8.3:

Bugfixes:

* Fix relative paths in .mod files
* Allow comma and period in localization #markup

Fix false positives:

* Don't warn about an `if` without effect, if its `limit` has side effects
* Do strict scope validation of scripted lists at the call site, not at
  the list definition.

Features:

* Strict scope checking for scripted rules
* Strict scope checking for builtin on_actions
* Redid gui validation