Include year in markdown headers

src/Years/Y2015/Day1.md

@@ -1,4 +1,4 @@
-# Day 1
+# Year 2015 Day 1
 
 Pretty simple, basic warmup problem, nothing really novel is on display here except the effectful part computations.
 

src/Years/Y2015/Day2.md

@@ -1,4 +1,4 @@
-# Day 2
+# Year 2015 Day 2
 
 This day provides us our first little taste of effectful parsing
 

src/Years/Y2015/Day3.md

@@ -1,4 +1,4 @@
-# Day 3
+# Year 2015 Day 3
 
 This day provides a gentle introduction to `mutual` blocks and mutually recursive functions. 
 

src/Years/Y2015/Day4.md

@@ -1,4 +1,4 @@
-# Day 4
+# Year 2015 Day 4
 
 This day introduces us to a little bit of FFI, linking to openssl to use it's `MD5` functionality.
 

src/Years/Y2015/Day5.md

@@ -1,4 +1,4 @@
-# Day 5
+# Year 2015 Day 5
 
 This day provides a nice chance to introduce [views](https://idris2.readthedocs.io/en/latest/tutorial/views.html), specifically `String`'s [`AsList`](https://www.idris-lang.org/docs/idris2/current/base_docs/docs/Data.String.html#Data.String.AsList) view, which lets us treat `String`s as if they were lazy lists or iterators.
 

src/Years/Y2015/Day6.md

@@ -1,4 +1,4 @@
-# Day 6
+# Year 2015 Day 6
 
 <!-- idris
 module Years.Y2015.Day6