Fix crash while changing maps

• This patch fixes an issue that may cause MLHook to crash the game while changing maps. This crash appears to effect some people more than others.
• This may or may not address such crashes in general -- feedback and bug reports on this matter is appreciated.
• Does not seem to fix an inconsistent crash while changing game modes (it's unknown if this crash is related to MLHook).

• Enable support for hooking Layer Custom Events
• Support deregistration of ML-time callbacks (via UnregisterMLHooksAndRemoveInjectedML)
• Add editor UI layers to UI layer browser
• Make logs more discreet
• Add logs window that's more verbose
• Move UI layers browser + event inspector under their own menu in plugins menu
• Fix some potential crashes (not observed in the wild)

• Add support for Editor.PluginMapType as a ManiaApp
• Fix injected ML disappearing when the game server changes game mode while the player is in it (thanks @Beu)
• Add function documentation to help authors of dependent plugins
• Support registering callbacks to be called during ML execution (MLHook::RegisterPlaygroundMLExecutionPointCallback(cb))

Added MLHook::Queue_MessageManialinkPlaygroundServer methods for communicating with the game server via netread/netwrite queues. Allows Angelscript <-> GameMode communication.

Fix possible crash conditions around .Triming a zero-length string -- usually while developing plugins -- and add some cautionary measures.

• Add full support for Menu ML.
• Fix issue where references to shared classes would not be completely removed when unloading a dependent plugin.
• Add support for non-standard game modes that don't add UI layers to GetApp().Network.ClientManiaAppPlayground.
• General code polish and refinement.
• Fix potential crash situation when reloading plugins during development.
• (For Developers) Menu ML Pages now in UI Layers browser.
• (For Developers) Add 'Copy ML' button to UI layers in browser.

• don't try to clean up a layer if the current playground is null (fix possible crash)
• minor refactoring to fix compiler warnings, improve safety, remove T@ &in usage
• add module names to injected ML pages

• v0.3.2
  • fix null pointer exception in hook router (rare edge case)
  • enable routing all custom events from script handler/playground (e.g., CustomEvent(TMxSM_Race_Record_NewRecord, {"48260"}, Source=PG_SendCE)). To hook these game events:
    • specify the full event name when creating the hook
    • specify isNadeoEvent as true when calling void RegisterMLHook(HookMLEventsByType@ hookObj, const string &in type = "", bool isNadeoEvent = false)
    • layer custom events not supported due to performance impact (there are potentially 100s of these on some frames b/c they're propagated through many ML elements)

• Fix bug with exports not working properly. Unsure of root cause but just changing directories fixed it.

• v0.3.0

  • breaking change WRT hooks (OnEvent) to improve overhead of distributing data -- OnEvent now takes an MLHook::PendingEvent@ event with attrs: .type and .data.
  • performance improvements WRT HookRouter

• v0.2.0

  • breaking change re ML receiving msgs from MLHook Text[][] now instead of Text[] so more than one string can be sent.
  • breaking change re injected ML: should not be wrapped in <script><!--, --></script> anymore.
  • added exported DebugLogAllHook utility class
  • fix crash due to mismatching preprocessor conditions and changes to the way some events can be accessed

• v0.1.5-0.1.8

  • Add cleanup of injected ML on plugin unload
  • Improve UILayer browser
  • API for getting a feed of data
  • avoid exposing dangerous developer tools to typical users

• v0.1.4

  • API braking change in prep for supporting multiple injection/communication contexts: playground, menu, editor, etc. Each requires its own monitoring loop, etc.
  • More events gathered now (when they come from PendingEvents there are lots of duplicates, tho)
  • Inspector improvements: menu item, filters
  • Added some safety features, but won't help with all cases b/c some crashes aren't due to stuff we can try{}catch{}
  • Added a RequireVersionApi that will send a notification & block indefinitely if MLHook is of the wrong version (ideally this can be used to avoid issues when MLHook updates)

• v0.1.3

  • fix injection of ML code so that it is repeated on new playground loads

• v0.1.1-2

  • mostly regarding consistency of injection and communication