AddScene Improvements: javadoc & code structure
Improvements in preferences' javadoc
Improvements in ChangeInitialScene: javadoc and input validation
Improvements in NewGame: input validation
Improvements in CompositeCommand javadoc
Minor fix in SidesLayout
Minor refactor in BaseGallery (@rotarudan and @gorco be aware of this): galleryTable => galleryGrid
Desktop platform: moving the construction of JavaRequestHelper to the DesktopPlatform constructor
Code legibility improvements in the view: mainBuilder and ScenesList

Javadoc + removal of anonymous classes
Fixes #111 and perhaps #179 (needs to be checked)
Formatting
Creating a json-schema for "release.json", a file to be included in every release that stores information about appVersion (e.g. 2.0.0) and type (canary|stable|beta|dev)
Adding an appVersion field to editorgame so we can know the version of the editor used to create the game
Deleting editor-bindings.json - it was empty and unused
- Refactoring es.eucm.ead.editor.core.appdataRelease to ReleaseInfo (less confusing I hope)
- Adding release.json load to EditorAssets + test
Minor unrelated javadoc
Setting EditorGame.appVersion each time a game is created or saved.
Tests updated
Minor unrelated fix in NewGameTest
Fixing tests. Formatting
Renaming "canary" to "nightly"