Major changes around events, event log, etc.

* User event log is now functional & attached to various events
* Add additional missing system events
* Completely re-write last_callers to have new functionality, etc.
* Events.addListenerMultipleEvents()
* New 'moduleInitialize' export for module init vs Event specific registerEvents
* Add docs on last_callers mod

docs/modding/last-callers.md

@@ -0,0 +1,34 @@
+---
+layout: page
+title: Last Callers
+---
+## The Last Callers Module
+The built in `last_callers` module provides flexible retro last callers mod.
+
+## Configuration
+### Config Block
+Available `config` block entries:
+* `dateTimeFormat`: [moment.js](https://momentjs.com) style format. Defaults to current theme → system `short` format.
+* `user`: User options:
+    * `collapse`: Collapse or roll up entries that fall within the period specified. May be a string in the form of `30 minutes`, `3 weeks`, `1 hour`, etc.
+* `sysop`: Sysop options:
+    * `collapse`: Collapse or roll up entries that fall within the period specified. May be a string in the form of `30 minutes`, `3 weeks`, `1 hour`, etc.
+    * `hide`: Hide all +op logins
+* `actionIndicators`: Maps user actions to indicators. For example: `userDownload` to "D". Available indicators:
+    * `userDownload`
+    * `userUpload`
+    * `userPostMsg`
+    * `userSendMail`
+    * `userRunDoor`
+* `actionIndicatorDefault`: Default indicator when an action is not set. Defaults to "-".
+
+### Theming
+When in a list view, the following `itemFormat` object is provided:
+* `userId`: User ID.
+* `realName`: User's real name or "N/A".
+* `ts`: Timestamp in `dateTimeFormat` format.
+* `location`: User's location or "N/A".
+* `affiliation` or `affils`: Users affiliations or "N/A".
+* `actions`: A string built by concatenating action indicators for a users logged in session. For example, given a indincator of `userDownload` mapped to "D", the string may be "-D----". The format was made popular on Amiga style boards.
+
+