Extend "var" to allow type inference on variables.

test/test_suite/assignment/var_variable.c3t

@@ -0,0 +1,40 @@
+module test;
+import std::io;
+
+
+macro @foo(;@body)
+{
+	var i = 1.0;
+	@body();
+}
+
+fn void main()
+{
+	@foo() { int j = 1; };
+	@foo() { var j = 1.0; }; // #error: is only allowed inside
+}
+
+fn void test()
+{
+	var g = 1; // #error: is only allowed inside
+}
+
+macro void test2m()
+{
+	var h = { 1, 2 }; // #error: cannot be inferred
+}
+
+fn void test2()
+{
+	test2m();
+}
+struct Foo { int a; }
+macro void test3m()
+{
+	var $foo = Foo.membersof;
+	var h = $foo[0]; // #error: compile time type
+}
+fn void test3()
+{
+	test3m();
+}