Incorporate Move Semantics exercises from Felix's tutorial

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Connects to #6

move_semantics/move_semantics1.rs

@@ -0,0 +1,42 @@
+// Make me compile! Scroll down for hints :)
+
+pub fn main() {
+    let vec0 = Vec::new();
+
+    let vec1 = fill_vec(vec0);
+
+    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+
+    vec1.push(88);
+
+    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+
+}
+
+fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+    let mut vec = vec;
+
+    vec.push(22);
+    vec.push(44);
+    vec.push(66);
+
+    vec
+}
+
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+// So you've got the "cannot borrow immutable local variable `vec1` as mutable" error on line 8,
+// right? The fix for this is going to be adding one keyword, and the addition is NOT on line 8
+// where the error is.