Merge Request for Issue/13 - dynamic list item removed

Closes #13

See merge request !7

The item is now removed from the dictionary of list items before calling the OnItemRemoved function, but the root GameObject is destroyed afterwards just to make sure Unity isn't doing any cleanup before a derived class has a chance to.

Merge Request for Issue/16 - implicit override

Closes #16

See merge request !8

Added an implicit operator to get a value from a ScriptableVariable so you don't have to type .Value when using its value.

Merge Request for Issue/11 - list variables

Closes #11

See merge request !6

Added an indexer override and Count function.  Renamed the list changed event and added another one for when a list item changes.

Added a new type of scriptable variable that handles lists of values.  The list itself is not accessible externally and any function that modifies it fires an event that the value has been changed.

The EventLogController now fires an event when logging stopped with the filename of the new log file.

Fixed an issue with Int and Float inputs to handle someone typing in negative numbers and decimals as they would in normal forms.

EventLog can now redirect events to the Unity Log.

See merge request !5

Added option to copy added events to be displayed in the Unity Log. Kind of useful to view the events as they come in.

Merge Request for Issue/6

Closes #6

See merge request !4

Added a component for firing game events on Unity Start and added the ability to delay firing Unity Events when a Game Event is being listened to.

Added a class that maps Unity Input Actions to Game Events.  The shared package is now dependent on the Unity Input system package until it's permanently part of the engine.

Merge Request for Issue/3 Added game event loggers for the four types of basic value game events.

Closes #3

See merge request !3

Merge Request for Issue/4 Wrapped the game event listeners in a try/catch block so that if some listener...

Closes #4

See merge request !2

Wrapped the game event listeners in a try/catch block so that if some listener to a GameEvent throws an exception, any other GameEventListeners will still get their functions called.

Made a new Util package for shared things with no clearly defined system with one script to begin with that quits a Unity application.

Removed a needless ToString() on a string variable that actually caused problems if the string in question was null.

Gave the int variable input the same treatment as the float one so you can delete it all back to 0 if you'd like.

Apparently events can't be fired from inherited classes, so the ScriptableVariable base class now has a protected function to fire its OnValueChanged event.