Added a changelog, finally!

CHANGELOG.md

+# Changelog
+
+## 2019.1.2
+
+#### Changed
+
+* **[Breaking]** Discover Assets now reference many Scenes/SceneSetups 
+  * Action to take: have to re-reference scenes in Discover Asset
+
+#### Added
+
+* Added Screenshot Manager (Defaults to F11 to take screenshots)
+* Added OnMouseDownEvent
+* Added OnMouseHoverEvent
+* Added OnVisibilityEvent
+* Added SaveDataSwitchOnIntLogic
+
+#### Fixed
+
+* Fixed warning in CycleResolutionsAction
+
+
+
+## 2019.1.1
+
+#### Changed
+
+#### Added
+
+* Log Action
+* Added Playable Director to objects in discover (to open atimeline at a give playable director)
+* Added support of Game Save Value index for Factories (in order to select a blueprint object from a saved value)
+
+#### Fixed
+
+* Fixed Import Errors at first project load, including the way we load discover and GameplayIngredients project settings
+
+* Secure checks in Gathering Manager classes from assembly (skips protected assemblies now)
+
+  
+
+## 2019.1.0
+
+#### Changed
+
+* Removed counts in OnTriggerEvent
+* Callables can now be friendly-named (with default formatting)
+* Updated Starter Packages
+
+#### Added
+
+- Added NTimesLogic (split from OnTriggerEvent)
+- Added Replace Mode for Level Streaming Manager
+- Added UIToggle Action and Property Drawer
+- Added Audio Play Clip Action
+- Added Platform Logic
+
+- New Welcome Screen, with Wizard
+- New optional GameplayIngredients Project Configuration asset 
+  - Toggles for verbose callable logging
+  - Manager Exclusion List
+- New Scene from Template Window + Config SceneTemplateLists Assets
+  - Helps creating new scenes from user-made templates
+- New Discover Window System:
+  - Adds a new DiscoverAsset to reference Levels / Scene Setups
+  - Adds new Discover components in scenes
+  - Discover window helps navigate scenes while in editor and discover content.
+- Added improved Game Manager
+  - Manages loading of main menu & levels directly instead of using LevelStreamingManager
+  - Manages Level Startup in sync after all scenes have started.
+
+#### Fixed
+
+* Fixed code to run on Unity 2019.1
+* Fixed factory managed objects upon destroy
+* Fixes in LinkGameView when application is not playing
+* Fix in LevelStreamingManager incorrect computation of Scene Counts
+* Fixes in VirtualCameraManager
+* Fixes in Find/Replace window
+* Fixes in Hierarchy View Hints for Unity 2019.3 new skin
+
+
+
+## 2018.3.0
+
+Initial Version

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