Error Fixes

- Lexer discarding all newlines (now replaces it with spaces)
- Cleanup of Type check and remove function in parser
- Cleanup in Compiler.cs

Compiler/Parser/Exceptions/MissingTokenException.cs

@@ -0,0 +1,15 @@
+using System;
+using Compiler.Lexer;
+
+namespace Compiler.Parser.Exceptions
+{
+    public class MissingTokenException : Exception
+    {
+        public override string Message { get; }
+
+        public MissingTokenException(TokenType expected)
+        {
+            this.Message = "Expected Token " + expected + " missing.";
+        }
+    }
+}