[ADD]Serialize/Deserialize Kit. See #361
[TEST] Add some test for MaterialContainer and KitInstance
serialization. See #361
[FIX] Fix the class for the test. See #361
[FIX] Forgot the color in the serialization. See #361
[MOD] Adding a better way to also serialize the ArmorPart.
[FIX] Correction of the test.