added spawnManager -  press "1" to spawn a wave
started adding GUI for spawner, havent added any functionality yet.
added GUI Spawner with functionality. Press " ~ " to toggle the GUI on/off and press "1" to spawn a wave.
Merge branch 'Feature/GUIspawner'

* Feature/GUIspawner:
  added GUI Spawner with functionality. Press " ~ " to toggle the GUI on/off and press "1" to spawn a wave.
  started adding GUI for spawner, havent added any functionality yet.
  added spawnManager -  press "1" to spawn a wave

Conflicts:
	Assets/Scripts/testProjectile_Script.js
	Assets/main.unity
	ProjectSettings/TagManager.asset