shared.dataInput:

Added shared.enums.XMLFileType, which is used to specify if a string contains a file path or file contents.
Updated the XML readers to use it.

Testing:
Moved the networking tests and resources into racevisionGame module.
Moved the remaining tests from visualiser into racevisionGame, and added a few empty tests to implement later.

racevisionGame/src/test/java/shared/dataInput/RaceXMLReaderTest.java

@@ -0,0 +1,5 @@
+package shared.dataInput;
+
+public class RaceXMLReaderTest {
+//TODO
+}