Add missing Assets/Scenes.meta file
Add playerShip asset and its dependencies
Amend .gitattributes for *.mat, *.cubemap files to be LF
Ignore Assets/ directory by default

New assets must be force-added using `git add -f NEW_ASSET`. This is to
keep imported but not-yet-used assets from polluting the output of
`git status`.
Merge branch 'playerShip' into develop
Add Rigidbody to Player
Add playerShip mesh collider and make it a trigger
Add player jet engine prefab and its dependencies
Add missing *.meta files for Materials/ and Models/
Add missing material files for player jet engine