Two minor fixes:
- In EditorDesktop, I've wrapped frame.setVisible(true) with a SwingEDTUtils.invokeLater(Runnable runnable) call, as this is the way this should be done.
- I've fixed parity2's project.json file so it can be actually opened with the editor
Adding basic support for deleting scenes. This involved:
- Creating a CompositeCommand
- Creating a DeleteScene action
- Modification of view (MainBuilder, ScenesList, SidesLayout, TopBottomLayout, EditorGameView, LeftRightLayout) to make the contextual menu appear also after clicking on particular scenes and to make ScenesList layout adjust properly

Also, some minor fixes have been included as I occasionally found things to be fixed
Fixing formatting with maven
Fix mainClass for editor in pom.xml
DeleteScene does not need any longer to force deletion of the scene.json file
Update .travis.yml
come on, travis
java.nio.Files can not be used. Only available in Java 7
EditScene.Name replaced by "editScene"
Merge pull request #96 from jtorrente/editor-deletescene

Editor deletescene
Created editor schema
- Added schema generation configuration to root pom
Added editor-schema to editor-core
Added GameMetaData (as substitute of Project)
Effectively substitute Project for GameMetadata in the editor
Merge pull request #106 from anserran/metadata

Created editor-schema and GameMetadta
Fixes #94
Added Newer/Older shorting method to ProjectGallery.
Fixes #95
Added reorder list command
Fixed small typo: short ~> sort